KR20030093516A - Multi-function measuring Gauge for Fit-up of the ship block - Google Patents
Multi-function measuring Gauge for Fit-up of the ship block Download PDFInfo
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- KR20030093516A KR20030093516A KR1020020031095A KR20020031095A KR20030093516A KR 20030093516 A KR20030093516 A KR 20030093516A KR 1020020031095 A KR1020020031095 A KR 1020020031095A KR 20020031095 A KR20020031095 A KR 20020031095A KR 20030093516 A KR20030093516 A KR 20030093516A
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- step measuring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/02—Rulers with scales or marks for direct reading
- G01B3/04—Rulers with scales or marks for direct reading rigid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/56—Gauges for measuring angles or tapers, e.g. conical calipers
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- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
Description
본 발명은 선체블록 취부용 다기능 계측 게이지에 관한 것으로, 보다 상세하게는 선탑재 블록 주골재의 모울드라인(MOULD LINE)을 신속·정확하게 인출할 수 있도록 계측 게이지의 각면을 사용하여 주판단차, 상하단차, 수직단차, 호퍼단차의간편하고 정확하게 계측하도록 구성된 선체블록 취부용 다기능 계측 게이지에 관한 것이다.The present invention relates to a multi-function measuring gauge for hull block mounting, and more specifically, using the respective sides of the measuring gauge to pull out the mold line (MOULD LINE) of the block mounted aggregate, the main plate step difference, the upper and lower ends The present invention relates to a multi-function gauge for hull block mounting, which is configured for easy and accurate measurement of cars, vertical steps and hopper steps.
대형 선박의 건조에 널리 사용되는 방법으로 선박 탑재 블록을 이용한 건조방법을 들 수 있다. 이는 선체를 복수의 블록으로 분할하여 이를 지상에서 각각 건조한 뒤 도크(dock)로 이송하여 조립함으로써 도크의 가동율을 높이는 건조방법이다.As a method widely used for the construction of a large vessel, there is a drying method using a ship mounted block. This is a drying method of increasing the operation rate of the dock by dividing the hull into a plurality of blocks, each of which is dried on the ground and then transported and assembled into a dock.
이와 같은 선박 탑재 블록은 주골재로서 늑재(Floor), 거더(Girder), 격벽(Bulkhead) 등으로 구성되며, 벌크화물선(Bulk Carrier)과 정유제품운반선(Product Oil Carrier) 및 원유탱커(Crude Oil Tanker)의 경우 주골재로서 호퍼(Hopper)를 포함하여 구성되었다.Such ship-mounted blocks are composed of floor, girder, bulkhead, etc. as main aggregates, and are bulk carriers, product oil carriers, and crude oil tankers. ) Is composed of hopper (Hopper) as the main aggregate.
상기 선박 탑재 블록은 블록의 제조공정에서 블록의 데크 상면에 후탑재 블록의 설치 기준이 되는 몰드 라인(Mould line)으로부터 100mm 이격된 거리에 100마크 라인을 표시한다.The ship-mounted block displays a 100 mark line at a distance of 100 mm from a mold line, which is a reference for installation of a post-mounted block, on a deck upper surface of the block in a manufacturing process of the block.
이와 같이 100마크 라인이 표시된 선탑재 블록의 위쪽 또는 옆(좌,우)쪽으로 후탑재 블록을 탑재하여 용접하기 전 선,후 블록의 주골재 어라인먼트 맞춤작업(취부)을 하는 과정에서 주골재를 데크 상면에서 찾는 작업이 종래의 경우 석필로 문질러서 주골재의 위치를 찾거나 또는 줄자를 일부 잘라 100마크 라인에서 계측하여 이면에 있는 골재의 위치를 데크 상면에 표기하는 작업방법을 사용하는데, 이는 계측 인출방법이 부정확하고 작업공수가 많이 소요되는 문제점이 발생되었다.In this way, the main aggregate in the process of customizing the main aggregate alignment of the front and back blocks before mounting and mounting the post-mounted block toward the top or side (left, right) of the preloaded block marked with 100 mark lines. In the conventional case of finding the upper surface of the deck by rubbing with a stone pill to find the location of the main aggregate, or by cutting a part of the tape measure on the 100 mark line using the method of marking the position of the aggregate on the upper surface of the deck, which is The problem of measuring drawing method is inaccurate and a lot of work is required.
본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 안출되는 것으로, 그 목적은 선박 블록 세팅과정에서 주판 상호 버트 접합부(Butt Joint) 단차조정 또는 연속되는 메인데크(연속판)를 두고 상하 골재가 수직,수평 직교부위 필레트 접합부(Fillet Joint) 단차를 정확, 신속히 계측하고 단차맞춤(Alignment)으로 인한 강한 응력 집중처의 크랙 방지할 수 있으며, 취부작업과 검사작업시 휴대가 간편하고 사용이 편리하여 건조시 탑재 블록 품질향상과 아울러 건조 단축시킬 수 있는 다기능 계측 게이지를 제공함에 있다.The present invention is devised to solve the conventional problems as described above, the purpose is to vertically aggregate the upper and lower aggregates with the butt joint step (Butt Joint) step adjustment or continuous main deck (continuous plate) in the ship block setting process Accurately and quickly measure the fillet joints in the horizontal orthogonal area, and prevent the cracks in the strong stress concentration due to the alignment, and are portable and convenient to use during installation and inspection. In addition to improving the quality of the mounting block when drying, it provides a multi-function measuring gauge that can shorten drying.
상기와 같은 본 발명의 목적은 기준면, 제 1 호퍼단차 계측면, 제 2 호퍼단차 계측면, 주판단차 계측면, 수직단차 계측면을 구비한 다각형상의 판형 게이지로서 사용목적에 따라 각면을 이용하여 주판단차, 상하단차, 수직단차를 계측 및 검사하도록 구성되어 신속하고 정확하게 모울드라인의 인출 및 단차를 계측할 수 있는 다기능 계측 계이지를 제공함으로써 달성된다.The object of the present invention as described above is a polygonal plate-shaped gauge having a reference plane, a first hopper step measuring surface, a second hopper step measuring surface, a main plate step measuring surface, and a vertical step measuring surface. It is achieved by providing a multi-function measuring instrument that is configured to measure and inspect the main plate step, the top and bottom step, and the vertical step to measure the draw line and step of the mold line quickly and accurately.
도 1 은 본 발명에 따른 다기능 계측 게이지의 구조를 나타낸 구조도1 is a structural diagram showing the structure of a multi-function measuring gauge according to the present invention
도 2a,2b 는 본 발명에 따른 다기능 계측 게이지를 이용한 호퍼단차 계측상태를 나타낸 예시도Figure 2a, 2b is an exemplary view showing a hopper step measurement state using the multi-function measurement gauge according to the present invention
도 3 은 본 발명에 따른 다기능 계측 게이지를 이용한 주판단차 계측상태를 나타낸 예시도Figure 3 is an exemplary view showing a measurement state of the main plate using the multi-function measuring gauge according to the present invention
도 4 는 본 발명에 따른 다기능 계측 게이지를 이용한 상하단차 계측상태를 나타낸 예시도Figure 4 is an exemplary view showing the up and down step measurement state using the multi-function measurement gauge according to the present invention
도 5 는 본 발명에 따른 다기능 계측 게이지를 이용한 수직단차 계측상태를 나타낸 예시도5 is an exemplary view showing a vertical step measurement state using the multi-function measurement gauge according to the present invention
도 6 은 종래의 모울드라인 인출과정을 나타낸 예시도6 is an exemplary view showing a conventional mold line withdrawal process
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
(A) : 100마크 (B) : 모울드라인(Mould Line)(A): 100 mark (B): Mold Line
(C) : 100마크 라인 (X) : 단차(C): 100 mark lines (X): step
(1) : 게이지 (2) : 기준면(1): gauge (2): reference plane
(3) : 제 1 호퍼단차 계측면 (4) : 제 2 호퍼단차 계측면(3): first hopper step measuring surface (4): second hopper step measuring surface
(5) : 주판단차 계측면 (6) : 수직단차 계측면(5): Main plate step measuring surface (6): Vertical step measuring surface
(7a)(7b)(7c)(7d) : 간섭방지부(7a) (7b) (7c) (7d): Interference prevention part
(8) : 제 1 눈금자 (9) : 제 2 눈금자(8): first ruler (9): second ruler
(11) : 탱크탑(Tank top)(11) tank top
(12) : 호퍼 (13) : 주판12: Hopper 13: abacus
(14) : 연속판 (15) : 주골재14: continuous plate (15): main aggregate
(16a)(16b)(16c)(16d) : 교차점(16a) (16b) (16c) (16d): intersection
(100) : 선탑재 블록 (110) : 후탑재 블록(100): Preload Block 110: Post Mount Block
(120) : 탱크탑 (130) : 호퍼120: tank top 130: hopper
(140) : 주골재 (150) : 파워램(Power Ram)140: Main aggregate (150): Power Ram
상기한 바와 같은 목적을 달성하고 종래의 결점을 제거하기 위한 과제를 수행하는 본 발명은 호퍼가 있는 선종 즉, 벌크화물선, 원유탱커, 정유제품운반선의탱크탑(Tank top)과 호퍼의 취부각도 135°및 130°에 대응하는 제 1,2 호퍼단차 계측면이 구비되고, 주판 상호 버트 접합부의 단차를 계측할 수 있는 주판단차 계측면이 구비되며, 연속판 위에 얹히는 후탑재 블록의 주골재의 단차를 계측하는 수직단차 계측면이 구비되어 블록 취부작업시 계측이 용이한 다기능 계측 게이지를 특징으로 한다.The present invention, which achieves the above object and accomplishes the problem for eliminating the conventional drawbacks, has a tank top and a hopper mounting angle of a bulk cargo ship, a crude oil tanker, a refinery product carrier 135 First and second hopper step measuring surfaces corresponding to ° and 130 ° are provided, and the main plate step measuring surface for measuring the step difference between the abutment butt joints is provided, and the main aggregate of the post-mounted block placed on the continuous plate It is equipped with a multi-level measuring gauge that is equipped with a vertical step measuring surface for measuring a step difference, which is easy to measure when mounting a block.
상기 탱크탑 및 연속판은 데크의 일종으로서, 탱크탑은 선박의 중앙부위에 탑재되는 블록의 상면 데크를 칭하는 것이고, 상기 연속판은 주골재와 주골재 사이를 관통하는 데크를 칭하는 것이며, 주판은 탱크탑 및 연속판등을 총칭하는 것이다.The tank top and the continuous plate is a kind of deck, the tank top refers to the upper deck of the block mounted on the central portion of the ship, the continuous plate refers to the deck passing between the main aggregate and the main aggregate, It is a generic term for tank top and continuous plate.
이하, 본 발명의 실시예를 첨부도면과 연계하여 상세히 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
도 1 은 본 발명에 따른 다기능 계측 게이지의 구조를 나타낸 구조도를 도시한 것으로, 본 발명은 제 1 눈금자(8)가 표시된 기준면(2)과, 상기 기준면(2)과 130°의 내각을 구비토록 기준면(2)의 일측에 형성된 제 1 호퍼단차 계측면(3)과, 상기 기준면(2)과 90°의 내각을 구비토록 기준면(2)의 타측에 형성된 수직단차 계측면(6)과, 상기 수직단차 계측면(6)과 연결되고 제 2 눈금자(9)가 표시된 주판단차 계측면(5)과, 상기 주판단차 계측면(5)과 135.5°의 내각을 구비하고 주판단차 계측면(5)과 제 1 호퍼단차 계측면(3)을 연결하는 제 2 호퍼단차 계측면(4)으로 구성되고, 상기 기준면(2)과 제 1 호퍼단차 계측면(3)의 연결부 및 기준면(2)과 수직단차 계측면(6)의 교차점(16c) 및 제 2 호퍼단차 계측면(4)과 주판단차 계측면(5)의 연결부 및 주판단차 계측면(5)의 중앙부에 간섭방지부(7a)(7b)(7c)(7d)가 형성되었다.1 is a structural diagram showing a structure of a multi-function measuring gauge according to the present invention, and the present invention includes a reference plane 2 on which a first ruler 8 is displayed, and the reference plane 2 and an angle of 130 °. A first hopper step measuring surface 3 formed on one side of the reference plane 2, a vertical step measuring surface 6 formed on the other side of the reference plane 2 so as to have an internal angle of 90 ° with the reference plane 2, and The main plate step measuring surface 5 connected with the vertical step measuring surface 6 and the second ruler 9 is displayed, and the main plate step measuring surface 5 and the inside angle of 135.5 ° and the main plate step measuring surface (2) and a second hopper step measuring surface (4) connecting the first hopper step measuring surface (3), and the connecting portion and the reference plane (2) of the reference surface (2) and the first hopper step measuring surface (3) ), The intersection of the vertical step measuring surface 6 and the connection between the second hopper step measuring surface 4 and the main plate step measuring surface 5 and the center of the main plate step measuring surface 5 The portion (7a) (7b) (7c) (7d) was formed.
상기 제 1 눈금자(8)는 기준면(2)과 제 1 호퍼단차 계측면(3)이 교차하는 교차점(16a) 및 수직단차 계측면(6)과 기준면(2)이 교차하는 교차점(16d)으로부터 100mm 이격된 위치에 100마크(A)가 각각 형성되고, 그 좌우측에 1mm 단위의 눈금자가 각각 형성되었다.The first ruler 8 is formed from an intersection point 16a where the reference plane 2 and the first hopper step measurement surface 3 intersect, and an intersection point 16d where the vertical step measurement surface 6 and the reference plane 2 intersect. 100 marks A were formed at positions spaced 100 mm apart, respectively, and rulers in units of 1 mm were formed on the left and right sides thereof.
상기 제 2 눈금자(9)는 제 1 눈금자(8)와 동일한 구성으로서, 제 2 호퍼단차 계측면(4)과 주판단차 계측면(5)이 이루는 교차점(16b) 및 수직단차 계측면(6)과 주판단차 계측면(5)이 이루는 교차점(16c)으로부터 100mm 이격된 위치에 100마크(A)가 각각 형성되고, 그 좌우측에 1mm 단위의 눈금자가 형성되었다.The second ruler 9 has the same configuration as the first ruler 8, and includes the intersection 16b and the vertical step measuring surface 6 formed by the second hopper step measuring surface 4 and the main plate step measuring surface 5. ) And 100 marks (A) were formed at positions spaced apart from each other by 100 mm from the intersection 16c formed by the main plate step measurement surface 5, and a ruler in units of 1 mm was formed on the left and right sides thereof.
또한 상기 제 1,2 눈금자(8,9)는 게이지(1)의 전후면에 동일하게 형성되었다.In addition, the first and second rulers 8 and 9 are formed on the front and rear surfaces of the gauge 1 in the same manner.
이와 같은 제 1,2 눈금자(8,9)는 단차계측시 100마크 라인(C)과 100마크(A)의 일치여부를 판별한 후, 불일치할 경우 100마크(A)의 좌우측에 표시된 1mm 단위 눈금자를 읽으므로서 불일치량을 쉽게 계측할 수 있게 된다.The first and second rulers 8 and 9 determine whether the 100 mark line C and the 100 mark A coincide with each other in step measurement, and if there is a mismatch, 1 mm units indicated on the left and right sides of the 100 mark A Reading the ruler makes it easy to measure the amount of discrepancy.
상기 간섭방지부(7a)(7b)(7c)(7d)는 각 계측면(2)(3)(4)(5)(6)의 연결부 및 주판단차 계측면(5)의 중앙부를 일부제거함으로서 형성되고, 이는 계측시 계측부에 용접작업에 의해 형성된 비드에 의한 간섭현상을 방지하기 위해 형성되었다.The interference preventing portions 7a, 7b, 7c, and 7d are partially connected to the measurement surfaces 2, 3, 4, 5, and 6, and a central portion of the abacus measurement surface 5, respectively. It is formed by removing, and it is formed to prevent the interference phenomenon caused by the beads formed by the welding operation in the measurement unit during the measurement.
도 2a,2b 는 본 발명에 따른 다기능 계측 게이지를 이용한 호퍼단차 계측상태를 나타낸 예시도를 도시한 것으로, 상기 제 1 호퍼단차 계측면(3)은 정유제품운반선이나 원유탱커과 같이 탱크탑(11)과 호퍼(12)가 이루는 각도 즉, 취부각도가 130°인 선박의 경우 사용되고, 상기 제 2 호퍼단차 계측면(4)은 벌크운반선과 같이 취부각도가 135°인 선박에 사용되는 것이다.Figure 2a, 2b is an exemplary view showing a hopper step measuring state using a multi-function measuring gauge according to the present invention, the first hopper step measuring surface 3 is a tank top 11, such as a refinery carrier or crude oil tanker And hopper 12, that is, in the case of a ship having a mounting angle of 130 °, the second hopper step measuring surface 4 is used for a ship having a mounting angle of 135 °, such as a bulk carrier ship.
도 2a는 제 1 호퍼단차 계측면을 이용한 계측상태를 나타내고 있으며, 게이지(1)의 기준면(2)을 탱크탑(11)의 상면에 일치시킨 후, 제 1 호퍼단차 계측면(3)이 호퍼(12)와 맞닿도록 하여 기준면(2)에 형성된 제 1 눈금자(8) 즉, 100마크(A)와 탱크탑(11)에 표시된 100마크 라인(C)의 단차(X)를 계측하여 후탑재 블록이 설치 기준이 되는 모울드라인(B)을 용이하게 인출 가능함으로서 취부작업시 신속하게 수정할 수 있게 된다.FIG. 2A shows a measurement state using the first hopper step measuring surface. After matching the reference plane 2 of the gauge 1 to the upper surface of the tank top 11, the first hopper step measuring surface 3 is hopper. The first ruler 8 formed on the reference surface 2, that is, abutting the surface 12, i.e., the step X of the 100 mark A and the 100 mark line C displayed on the tank top 11 is measured and then mounted. The mold line B, on which the block is installed, can be easily withdrawn, so that it can be quickly modified during installation.
도 2b는 제 2 호퍼단차 계측면(4)을 이용한 계측상태를 나타내고 있으며, 주판단차 계측면(5)을 탱크탑(11)의 상면에 일치시킨 후, 제 2 호퍼단차 계측면(4)이 후탑재 블록의 호퍼(12)와 맞닿도록 하여 주판단차 계측면(5)에 형성된 제 2 눈금자(9) 즉, 100마크(A)와 탱크탑(11)에 표시된 100마크 라인(C)의 단차(X)를 계측하여 후탑재 블록이 설치될 기준이 되는 모울드라인(B)을 인출할 수 있게 된다.FIG. 2B shows a measurement state using the second hopper step measurement surface 4, after matching the main plate step measurement surface 5 to the upper surface of the tank top 11, the second hopper step measurement surface 4 is shown. The second ruler 9 formed on the main plate step measuring surface 5 so as to be in contact with the hopper 12 of the post-mounted block, that is, 100 mark A and 100 mark line C displayed on the tank top 11. By measuring the step (X) of the mold line (B) which is the basis for installing the post-mounted block can be drawn out.
도 3 은 본 발명에 따른 다기능 계측 게이지를 이용한 주판단차 계측상태를 나타낸 예시도를 도시한 것으로, 주판단차 계측면(5)의 중앙부에 형성된 간섭방지부(7d)가 선탑재 블록과 후탑재 블록의 주판(13) 이음부위에 형성된 용접비드에 위치하도록 게이지(1)를 위치시켜 간섭방지부(7d)의 양측 주판단차 계측면(5)과 주판(13)과의 이격된 거리로서 주판(13) 이음부위의 단차를 계측할 수 있게 된다.Figure 3 shows an exemplary view showing the abacus step measurement state using the multi-function measurement gauge according to the present invention, the interference prevention portion 7d formed in the center portion of the abacus step measurement surface 5 is the preload block The gauge 1 is positioned so as to be located at the weld bead formed at the joint part of the main plate 13 of the mounting block, and the distance between the main plate step measurement surface 5 and the main plate 13 on both sides of the interference prevention part 7d is determined. It is possible to measure the level difference of the main plate 13 joint portion.
도 4 는 본 발명에 따른 다기능 계측 게이지(1)를 이용한 상하단차 계측상태를 나타낸 예시도를 도시한 것으로, 상하단차 계측은 주판단차와 동일하게 주판단차 계측면(5)을 이용하여 계측하게 되며, 연속판(14)이 간섭방지부(7d)에 위치하도록 게이지(1)를 위치시켜 간섭방지부(7d)의 양측 주판단차 계측면(5)과 연속판(14)의 상하부에 위치한 주골재(15)와의 이격된 거리로서 상하부 주골재(15)의 단차(X)를 계측하게 된다.Figure 4 shows an exemplary view showing the up and down step measurement state using the multi-function measuring gauge 1 according to the present invention, the top and bottom step measurement is measured using the main plate step measuring surface 5, the same as the main plate step The gauge 1 is positioned so that the continuous plate 14 is located at the interference preventing unit 7d, and the upper and lower portions of the measuring plate 5 and the continuous plate 14 at both sides of the interference preventing unit 7d are positioned. The step X of the upper and lower main aggregates 15 is measured as the distance from the main aggregate 15 located.
도 5 는 본 발명에 따른 다기능 계측 게이지(1)를 이용한 수직단차 계측상태를 나타낸 예시도를 도시한 것으로, 연속판(14) 위에 얹히는 후탑재 블록의 주골재(15)에 게이지(1)의 수직단차 계측면(6)이 맞닿으며, 기준면(2)이 연속판(14)의 상면에 맞닿도록 위치시켜 기준면(2)에 형성된 제 1 눈금자(8)의 100마크(A)와 연속판(14)의 표시된 100마크 라인(C)의 단차(X)를 계측하여 모울드라인(B)을 인출하게 된다.5 is an exemplary view showing a vertical step measurement state using the multi-function measuring gauge 1 according to the present invention, the gauge (1) on the main aggregate 15 of the post-mounted block mounted on the continuous plate (14) Vertical step measurement surface 6 of the contact surface, the reference surface 2 is positioned so as to abut the upper surface of the continuous plate 14, 100 marks (A) of the first ruler 8 formed on the reference surface (2) and the continuous plate The mold line B is drawn out by measuring the step X of the displayed 100 mark line C of (14).
본 발명은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 발명이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위 내에 있게 된다.The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.
상술한 바와 같이 본 발명은 선박 블록 탑재후 건조 취부작업 및 품질 검사용으로 휴대가 간편하고 가벼워서 사용이 편리하고, 블록 취부작업시 계측이 용이하여 모울드라인을 인출하기가 종래보다 빠르고 정확하여 용접전 반드시 시행되는 취부작업 시간을 단축할 수 있으며 품질면에서 탑재 정도를 향상시킬 수 있는 효과가 있는 것이다.As described above, the present invention is easy to carry and light for dry installation work and quality inspection after loading of ship block, and it is convenient to use, and it is easy to measure during block installation work to draw out the mold line faster than before, It is possible to shorten the time required for the installation work to be carried out, and there is an effect of improving the mounting accuracy in terms of quality.
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| CN112179232A (en) * | 2020-10-14 | 2021-01-05 | 上海外高桥造船有限公司 | Measuring scale for hull structure |
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| KR101785488B1 (en) | 2015-10-06 | 2017-10-16 | 대우조선해양 주식회사 | Final shghting gage of vessels |
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