KR101516283B1 - Firefighting device for helideck and control method thereof - Google Patents

Abstract

FIELD OF THE INVENTION The present invention relates to a helicopter fire fighting apparatus and a control method thereof. According to an aspect of the present invention, there is provided a helicopter pancake unit provided with a helicopter take-off and landing surface for landing and landing helicopters. The helicopter landed on the pancake unit is provided with a fire- A plurality of fire extinguishing units for suppressing fire; A plurality of sensors provided in the pancake unit and capable of detecting landing of the helicopter; And a control unit for receiving a detection signal from the sensing unit to identify a landing position of the helicopter and driving at least a part of the plurality of fire extinguishing units based on a landing position of the helicopter. Can be provided.

Description

FIELDING DEVICE FOR HELDECK AND CONTROL METHOD THEREOF FIELDING DEVICE FOR HELDECK AND CONTROL METHOD THEREOF

FIELD OF THE INVENTION The present invention relates to a helicopter fire fighting apparatus and a control method thereof.

Generally, offshore plants such as drill ship, FPSO (Floating, Production, Storage and Offloading) or vessels that need to stay in the sea for a long time should operate helicopter , Which necessitates the installation of Helideck on the player or stern.

The helideck may be comprised of a pancake portion forming a deck floor where the helicopter takes off and landing and a pancake support portion supporting the pancake portion. The pancake part may be formed by connecting a plurality of plank to each other so as to support the helicopter. The pancake support may include H-shaped beams capable of supporting the pancake portion.

For example, the pancake portion may be formed by connecting a plurality of flank of aluminum material extending in one direction. Further, the pancake supporting portion includes a plurality of aluminum H beams extending long in a direction intersecting the extending direction of the flanks and disposed below the flanks to support the pancake portion, an aluminum H beam extending long in a direction intersecting the extending direction of the aluminum H beam, And a plurality of steel H beams disposed below the beam to support the aluminum H beam.

On the other hand, the helicopter is affected by the wind very much, and unlike the pilot 's intention during take - off and landing, unexpected accident can occur. Especially, when the helicopter takes off and land on a heli-deck operated under the sea condition where the waves hit, the risk of accidents increases greatly.

If an accident occurs when a helicopter landing or landing on the helideck, the helideck may be fired by oil spilled from the helicopter or helicopter. In this case, the fire should be suppressed as soon as possible to ensure the safety of the pilot and to prevent explosions or fire from moving to floating structures or ships.

For this purpose, a plurality of sprinklers for suppressing the fire can be installed in the pancake part. The sprinkler can be installed in such a manner that the upper surface of the pancake portion, that is, the take-off and landing surface is divided into a plurality of sectors and an appropriate number is arranged in each sector, and a nozzle for spraying droplets (clear water, seawater, foam, etc.) can do. At this time, the nozzle is installed in an exposed state on the upper part of the pancake part for smooth injection of droplets.

When a fire occurs on the heli-deck, a signal or operation of the landing man- ager near the control tower or heli-deck can cause a plurality of sprinklers to simultaneously spray droplets through the nozzles to extinguish the fire.

A plurality of sprinklers are appropriately arranged on the upper surface of the pancake part, and all of the sprinklers are actuated to suppress the fire when a fire occurs. It is not preferable from the viewpoint of economical efficiency and efficiency to operate all the sprinklers installed in the pancake part even when a local fire occurs There was a problem.

Korean Patent Publication No. 10-1217753

Embodiments of the present invention provide a helideck fire fighting apparatus and a control method thereof that can economically and efficiently suppress a fire on a helideck.

According to an aspect of the present invention, there is provided a helicopter that is provided in a pancake portion of a helideck that provides a take-off and landing surface for a helicopter to take off and land, and when a fire occurs in a helicopter landed on the pancake portion, Of the digestive tract; A plurality of sensors provided in the pancake unit and capable of detecting landing of the helicopter; And a control unit for receiving a detection signal from the sensing unit to identify a landing position of the helicopter and driving at least a part of the plurality of fire extinguishing units based on a landing position of the helicopter. have.

Also, the pancake unit may be divided into a plurality of sectors and managed, and each of the sectors may be provided with a plurality of fire extinguishers and a plurality of sensing units, respectively.

The control unit may further include: a position identifying unit that identifies a position of the sensing unit that transmits the sensing signal when a fire occurs on the pancake unit; And a determination unit for determining the sector including the position of the sensing unit that has transmitted the sensing signal and sending a driving signal to at least one of the fire extinguishing units included in the sector, have.

In addition, the control unit may include a storage unit that stores a database including data for identifying the positions of the sensing units, and the storage unit may store the unique codes of the sensing units, the mounting locations, And a database containing at least one or more of the information related to at least one of the information of the heli-deck.

In addition, the judging unit may be provided with a helicopter fire-fighting device for sending a return signal to the fire extinguishing unit when the fire suppression is completed.

In addition, at least one of the sensing units may be disposed adjacent to the fire extinguishing unit so that the fire extinguishing unit may be depressed by the helicopter.

Also, the control unit may be provided with a helideck fire fighting device for determining whether the fire extinguisher is operable based on a sensing signal received from the sensing unit disposed adjacent to the fire extinguishing unit.

The helicopter fire-fighting apparatus may further include a fire detection sensor for detecting whether or not a fire is generated on the pen-cake portion.

Also, a fire is detected in a helicopter landing on the pancake part of the helideck; Receiving a detection signal from a sensing unit that senses a position of the helicopter and recognizing a sector on which the helicopter landed based on the detection signal when a fire is detected; And sending an operation signal to the fire extinguishing unit included in the sector where the helicopter landed, from among the fire extinguishing units for spraying the fire-fighting medium for fire extinguishing.

Determining whether the fire suppression has been completed; And sending a return signal to the fire extinguishing unit which is in operation when the fire suppression is completed, a method of controlling the fire fighting apparatus of the helideck may be provided.

Determining whether the digestion unit is operable; And selecting the ones capable of operating among the fire extinguishers. In the step of sending the operation signals, a method of controlling the fire extinguishing device of the helideck may be provided, which sends an operation signal only to the selected fire extinguishers.

The control unit controls the fire extinguishing unit located in the other sector while varying the spraying distance of the fire extinguishing unit located in the other sector depending on the distance distanced from the fire extinguishing unit located in the sector where the helicopter landed A control method of the helicopter fire fighting apparatus can be provided.

According to the embodiment of the present invention, there is an advantage that it is possible to accurately cope with a fire by accurately grasping a point where a helicopter landed using a load sensor and operating only a sprinkler close to the position when a fire occurs.

1 is a top view of a helideck provided with a fire fighting apparatus according to a first embodiment of the present invention.
FIG. 2 is a diagram showing a connection state between a control unit provided in the helideck shown in FIG. 1 and each unit.
3 is a view showing the internal structure of the helideck shown in Fig.
4 is a flowchart showing a method of suppressing a fire using a fire fighting apparatus installed in the helideck of FIG.
FIG. 5 is a view for explaining a control method according to the distance of the extinguishing unit of FIG. 1;
FIG. 6 is a top view of a helideck provided with a fire fighting apparatus according to a second embodiment of the present invention. FIG.
7 is a flowchart showing a method of suppressing a fire using a fire fighting apparatus installed in the helideck shown in FIG.
FIG. 8 is a view showing an example of a helicopter landing on the helideck shown in FIG. 6. FIG.
FIG. 9 is a view showing another example of a helicopter landing on the helideck shown in FIG. 6. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 1 is a top view of a helideck provided with a fire fighting apparatus according to a first embodiment of the present invention, FIG. 2 is a view showing a connection state between a control unit provided in the helideck shown in FIG. 1 and each unit, 3 is a view showing the internal structure of the helideck shown in Fig.

1 to 3, a helideck 1 according to a first embodiment of the present invention may include a pancake portion 10 constituting an upper surface.

The upper surface of the pancake portion 10 may be divided into a plurality of sectors. Specifically, the upper surface of the pancake unit 10 may be divided into a first sector G1, a second sector G2, a third sector G3, and a fourth sector G4 having the same area. A fifth sector G5 in the shape of a square may be defined at the center of the helideck 1.

In the present embodiment, the top surface of the heli-deck 1 is divided into five sectors. However, the present invention is not limited to the case where the sectors of the present invention are divided into five sectors. It is also possible.

The pancake unit 10 may be provided with a fire-fighting apparatus 100 for extinguishing a fire. The fire fighting apparatus 100 includes a fire extinguishing unit 110 for spraying a fire fighting medium for fire fighting, a sensing unit 120 for sensing the position of the landing helicopter, a control unit for controlling the fire extinguishing unit 110 and the sensing unit 120 And a control unit 130 for controlling the display unit.

A plurality of fire extinguishers 110 may be provided for each sector, and may be general pop-up sprinklers. In addition, the fire extinguishing unit 110 is not protruded from the upper surface of the pancake unit 10 at normal times, and can be controlled so as to protrude to fire the fire-fighting medium when the fire occurs.

In the present embodiment, the case where the fire extinguisher 110 is a pop-up sprinkler that ejects the fire-fighting medium is described as an example, but the spirit of the present invention is not limited thereto. For example, it may be a device for spraying fire extinguishing powder instead of a sprinkler, or a device for spraying fluid for other fire suppression.

The sensing unit 120 may be provided for each of a plurality of sectors, and may be a sensor for sensing the position of the landing helicopter, for example, a general load sensor for sensing a load. However, the scope of the present invention is not limited thereto. For example, the sensing unit 120 may be a pressure sensor for measuring the applied pressure, and may be a strain gauge for measuring a deformation amount of a member constituting the pancake unit 10. [ Or an optical sensor that measures the amount of reflected light by receiving light reflected by emitting light and may be any of a configuration capable of accurately detecting the landing position of the helicopter landed on the pancake unit 10 Do.

When the sensing unit 120 is a load sensor, it is installed between the aluminum H beam 20 supporting the pancake unit 10 and the flank 12 constituting the pancake unit 10 as shown in FIG. 3 . In this case, the sensing unit 120 can sense a load acting on the flank 12, and when the helicopter lands on the flank 12, the load of the helicopter is transmitted to the sensing unit 120 through the flank 12 So that the load of the helicopter can be effectively detected.

The control unit 130 may be connected to the fire extinguishing unit 110 and the sensing unit 120 and may receive the sensing signal from the sensing unit 120 to control the fire extinguishing unit 110. For example, the control unit 130 may be a small built-in computer, and may include a program, a memory, and a data processing unit including a CPU. The program may include an algorithm for determining whether the fire extinguishing unit 110 is operating and determining whether the fire extinguishing unit 110 is operated based on the sensing signal received from the sensing unit 120. The program may be stored in a storage unit 136 such as a computer storage medium such as a flexible disk, a compact disk, a hard disk, an MO (magneto-optical disk), etc. and installed in the control unit 130. The control unit 130 can independently control the plurality of fire extinguishers 110.

The control unit 130 includes a position identification unit 132 for identifying the position of each sensing unit 120, a determination unit 134 for determining whether the fire extinguishing unit 110 is operated, And a storage unit 136 for storing a database including identification data that can identify the user.

When the sensing unit 120 sends a sensing signal to the sensing unit 120, the position identifying unit 132 generates a unique code of the sensing unit 120 and a unique code of each sensing unit 120, So that the position of the sensing unit 120 transmitting the signal can be determined.

The determination unit 134 specifies a fire occurrence point based on the location identified by the location identification unit 132, derives a sector including a fire occurrence point, and operates the fire extinguishing unit 110 included in the sector A driving signal can be sent to the fire extinguishing unit 110 so as to suppress the fire. After the fire suppression is completed, the fire extinguishing unit 110 can be returned to the normal state by sending a return signal to the fire extinguishing unit 110.

The location identification unit 132 and the determination unit 134 may be part of the program included in the control unit 130 or may be physically independent and modularized.

The storage unit 136 may be a general data storage medium such as a flexible disk, a compact disk, a hard disk, and an MO (magneto-optical disk), and may store programs used in the controller 130. In addition, a correspondence table including information on the unique code, the installation position, the included sectors, and the like of each sensing unit 120 may be stored.

Meanwhile, the helideck 1 may further include a fire sensor (not shown) such as a heat sensor for detecting a fire in the upper surface of the pancake unit 10, (Not shown). However, the present invention is not limited thereto. For example, the manager may directly monitor the occurrence of a fire without including a fire detection sensor, and send a fire occurrence signal to the controller 130 when the fire occurs.

Hereinafter, the control method and effect of the helicopter fire fighting apparatus 100 according to the present embodiment will be described with reference to FIGS. 4 and 5. FIG.

FIG. 4 is a flowchart showing a method of suppressing a fire using a fire fighting apparatus installed in the helideck of FIG. 1, and FIG. 5 is a view for explaining a control method according to the distance of the fire fighting unit of FIG.

4 and 5, when a fire occurs in a helicopter landing on the helideck 1, the fire detection sensor may sense a fire and transmit a fire detection signal to the controller 130 (S10) . However, the present invention is not limited thereto. For example, it is also possible to transmit a fire occurrence signal to the control unit 130 by a method other than a fire detection sensor by an administrator directly pressing a button.

When a fire is detected, a predetermined signal may be transmitted from the sensing unit 120 to the control unit 130, which senses the load of the helicopter, and the position identification unit 132 of the control unit 130, The location of the sensing unit 120 that transmits the signal can be identified by collating the unique code and the position of the sensing unit 120 stored in the memory unit 120. [ When the position of the sensing unit 120 is identified, it can be determined which sector the position is included in (S20).

The control unit 130 can operate the fire extinguishing unit 110 by transmitting a signal for activating the fire extinguishing unit 110 of the corresponding sector to the fire extinguishing unit 110, Thus, the fire can be suppressed (S30).

At this time, only the fire extinguishing unit 110 of the corresponding sector may be operated, but it may be necessary to further operate the fire extinguishing unit 110 included in the surrounding sector depending on the scale of the fire. In this case, the control of the fire extinguishing unit 110 existing in the surrounding sector may be different according to the distance distanced from the fire extinguishing unit 110 existing in the sector including the fire extinguishing point.

For example, as shown in FIG. 5, each fire extinguisher 110 has a reference area C1 having a general spraying distance as a reference radius R1 and a maximum area C2 having a maximum spraying distance as a maximum radius R2 ). At this time, the reference area C1 of the fire extinguishing unit 110 of the fire-generating sector is divided into the fire extinguishing units 110 including the maximum area C2, that is, the fire extinguisher 110 may be controlled such that the fire-fighting medium is ejected by a distance that is greater than the reference radius R1 and less than the maximum radius R2. A part of the reference area C1 of the fire extinguishing part 110 of the fire-generated sector overlaps the fire extinguishing part 110, i.e., the first distance D1 to the second distance D2, The fire extinguishing units 110 arranged to be spaced apart from each other by a predetermined distance may be controlled so that the fire extinguishing medium is ejected as far as possible. Meanwhile, the fire extinguishing units 110 disposed farther from the fire extinguishing unit 110 than the second distance D2 can be controlled so as not to operate.

However, the control method according to the distanced distance as described above is merely an example, and the present invention is not limited thereto, and any control method capable of suppressing the fire efficiently can be adopted.

After the start of the injection of the fire-fighting medium in the fire extinguishing unit 110, the control unit 130 can determine whether the fire suppression is completed through the fire detection sensor (S40). If it is determined that the fire extinguishing is completed, And control is returned to the state before the occurrence of the fire (S50).

Hereinafter, a helicopter fire fighting apparatus and a control method thereof according to a second embodiment of the present invention will be described with reference to FIG.

The helideck fire fighting apparatus according to the present embodiment has a sensing unit 122 for discriminating the operation of the fire extinguishing unit 110 at a portion adjacent to the fire extinguishing unit 110 of the pancake unit 10 as compared with the first embodiment ) Are additionally provided, and the same parts will be referred to by reference numerals and explanations.

6 is a top view of a helideck provided with a fire fighting apparatus according to a second embodiment of the present invention.

Referring to FIG. 6, the sensing unit 122 may be disposed adjacent to the fire extinguishing unit 110, and the sensing unit 122 may have the same configuration as the sensing unit 120.

There may be a case where the helicopter is stepped on at least one of the digestion units 110 when landing on the pancake unit 10. [ In this case, if a fire occurs in the helicopter, the fire extinguishing part 110 touched by the helicopter may become inoperable. Therefore, it is necessary to identify the fire extinguishing unit 110 that can not be operated due to being stepped on by the helicopter, and to selectively operate only the fire extinguishing unit 110 that can be operated.

At this time, the sensing unit 122 installed adjacent to the fire extinguishing unit 110 where the helicopter is landed while being depressed on one of the fire extinguishing units 110 can send a sensing signal to the control unit 130, It is possible to identify the position of the sensing unit 122 in the sensing unit 122 and to recognize that the sensing unit 122 is incapable of operating the sensing unit 122, 110) can be selectively operated.

A specific method of controlling the fire extinguishing system of the present embodiment including the sensing unit 122 installed adjacent to each fire extinguishing unit 110 will be described below with reference to FIG.

7 is a flowchart showing a method of suppressing a fire using a fire fighting apparatus installed in the helideck shown in FIG.

Referring to FIG. 7, the present embodiment differs from the first embodiment in that the fire detection step S10, the landing sector grasping step S20, the fire extinguishing part 110 operating step S30, The step S40 and the returning step S50 of the fire extinguishing unit 110 are the same but the fire extinguishing unit 110 is detected as being incapable of operating among the fire extinguishing units 110 included in the landing sector after the landing sector grasping step S20 (S22), and a step S24 of selecting only the remaining operational fire extinguishers 110 excluding the fire extinguishing unit 110 that can not be operated can be added.

Specifically, the storage unit 136 of the control unit 130 may store the location of each fire extinguishing unit 110 and the corresponding unique code of the sensing unit 122, and the controller 130 may generate a fire occurrence signal If the sensing unit 122 receives a sensing signal, the determination unit 134 may identify the fire extinguishing unit 110 adjacent to the sensing unit 122 in operation S22.

The thus identified fire extinguishing unit 110 can be recognized as inoperable, and the remaining operational fire extinguishing units 110 except for the fire extinguishing unit 110 can be selected (S24).

The control unit 130 can operate the selected fire extinguishing units 110 existing in the fire extinguishing unit 110 so that the fire can be suppressed.

Hereinafter, the process of suppressing the fire through the method of controlling the fire fighting apparatus 100 of the helideck 1 will be described by taking the cases shown in FIGS. 8 and 9 as an example.

FIG. 8 is a view showing an example of a helicopter landing on the helideck shown in FIG. 6, and FIG. 9 is a view showing another example of a helicopter landing on the helideck shown in FIG.

8 and 9, the helicopter 3 landing on the helideck 1 may include a landing portion 32 abutting the pancake portion 10 at the time of landing, and the landing portion 32 The load of the helicopter 3 can be directly transmitted to the helideck 1.

In the present embodiment, the landing portion 32 is a skid, but the present invention is not limited thereto. For example, the landing portion 32 may be a wheel .

First, when a fire occurs in a state where the helicopter 3 is landed as shown in FIG. 8, the presence of the helicopter 3 is sensed by the sensing unit 120 'which contacts the landing unit 32 of the helicopter 3 And the sensing unit 120 'sensing the sensed signal may send a sensing signal to the control unit 130. [ When the control unit 130 receives the detection signal, it compares the inherent code of the sensing unit 120 ', which transmits the sensing signal from the position identifying unit 132, with the unique code table stored in the storage unit 136, Can be identified.

When the position of the sensing unit 120 'is identified, the determining unit 134 can determine in which sector the sensing unit 120' is included. According to FIG. 8, the sensing unit 120 ' 5 sector G5.

The fire fighting apparatus 100 provided in the fifth sector G5 is operated and the fire of the helicopter 3 can be suppressed after it is recognized that the helicopter 3 is at least partially included in the fifth sector G5.

On the other hand, as shown in FIG. 9, the helicopter 3 may land on the first sector G1 and the fourth sector G4. In this case, a part of the sensing part 120 included in the first sector G1 and a part of the sensing part 120 included in the fourth sector G4 sense the presence of the helicopter, The control unit 130 may determine that the helicopter 3 is present over the first sector G1 and the fourth sector G4 based on the information and the first sector G1 and the fourth sector G2, G4 to drive the fire fighting apparatus 100 to suppress the fire.

However, there is a possibility that the landing part 32 of the helicopter 3 may step on a part of the fire extinguisher 110. In this case, the sensing unit 122 'disposed adjacent to the fire extinguishing unit 110' tilted by the landing unit 32 is also stepped on by the landing unit 32, so that the sensing unit 122 ' ). ≪ / RTI >

When the control unit 130 receives the sensing signal from the sensing unit 122 ', the determining unit 134 may determine that the fire extinguishing unit 110' disposed adjacent thereto is inoperable. If the first sensing unit 122 ' And the remaining part of the extinguishing unit 110 included in the fourth sector G4 except for the extinguishing unit 110 '.

The control unit 130 can operate the selected fire extinguishing units 110, and thus the fire can be quickly suppressed.

While the present invention has been described in connection with certain exemplary embodiments thereof with reference to the accompanying drawings, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Range. ≪ / RTI > Skilled artisans may implement a pattern of features that are not described in a combinatorial and / or permutational manner with the disclosed embodiments, but this is not to depart from the scope of the present invention. It will be apparent to those skilled in the art that various changes and modifications may be readily made without departing from the spirit and scope of the invention as defined by the appended claims.

1: Heli Deck 10: Pancake part
12: Flank 20: Aluminum H beam
100: Fire fighting device 110:
120, 122: sensing unit 130:
132: Position identifying section 134:
136:

Claims (12)

A plurality of fire extinguishing units provided in the pancake unit of the heli-deck and spraying the fire-fighting medium when a fire occurs in the helicopter on the pancake unit to suppress the fire;
A plurality of sensors provided in the pancake unit and sensing landing of the helicopter by contact with the helicopter; And
And a control unit for receiving a sensing signal from the sensing unit and controlling driving of the plurality of fire extinguishing units,
Wherein,
Identifying a position of the sensing unit that has transmitted the sensing signal,
And drives the fire extinguisher having the fire-extinguishing medium ejection range including the position of the identified sensing unit among the plurality of fire extinguishers. The method according to claim 1,
The pancake unit is divided into a plurality of sectors and managed,
Wherein each of said sectors is provided with a plurality of said fire extinguishing units and said sensing units, respectively. 3. The method of claim 2,
Wherein,
A position identifying unit for identifying a position of the sensing unit that transmits the sensing signal when a fire occurs on the pancake unit; And
And a determination unit for determining the sector including the position of the sensing unit that has transmitted the sensing signal and sending a driving signal to at least one of the fire extinguishing units included in the sector. The method of claim 3,
Wherein,
And a storage unit for storing a database including data for identifying the positions of the sensing units,
Wherein,
Wherein a database including at least one of a unique code of each sensing unit, a mounting position, and information on a sector including each sensing unit is stored. The method of claim 3,
Wherein the judging unit sends a return signal to the fire extinguishing unit when the fire suppression is completed. The method according to claim 1,
Wherein at least one of the sensing units is disposed adjacent to the fire extinguishing unit so that the fire extinguishing unit is able to sense that the fire extinguishing unit is stepped on by the helicopter. The method according to claim 6,
Wherein the control unit determines the operation of the fire extinguisher based on a sensing signal received from the sensing unit disposed adjacent to the fire extinguisher. 8. The method according to any one of claims 1 to 7,
Further comprising a fire detection sensor for detecting whether or not a fire occurs on the pen-cake portion. Detecting a fire in a helicopter landing on the helicopter's pancake;
Receiving a detection signal from a sensing unit that senses a position of the helicopter and recognizing a sector on which the helicopter landed based on the detection signal when a fire is detected; And
And sending an operation signal to the fire extinguishing unit included in the sector where the helicopter landed, of the fire extinguishing unit for spraying the fire-fighting medium for fire suppression,
Wherein the sensing unit senses the position of the helicopter in contact with the helicopter. 10. The method of claim 9,
Determining whether the fire suppression has been completed; And
And when the fire suppression is completed, sending a return signal to the fire extinguishing unit in operation. 10. The method of claim 9,
Determining whether the digestion unit is operable; And
Further comprising the step of selecting among the fire extinguishers that are operable,
In the step of sending the operation signal,
And sending an operation signal to the selected fire extinguisher only. 10. The method of claim 9,
In the step of sending the operation signal,
And controlling the fire extinguishing unit located in the other sector while differentiating the spraying distance of the fire extinguishing unit located in another sector according to the distance distanced from the fire extinguishing unit located in the sector where the helicopter landed.

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