GB1212507A - Improvements in or relating to submersible beacon - Google Patents
Improvements in or relating to submersible beaconInfo
- Publication number
- GB1212507A GB1212507A GB1486867A GB1486867A GB1212507A GB 1212507 A GB1212507 A GB 1212507A GB 1486867 A GB1486867 A GB 1486867A GB 1486867 A GB1486867 A GB 1486867A GB 1212507 A GB1212507 A GB 1212507A
- Authority
- GB
- United Kingdom
- Prior art keywords
- beacon
- acoustic
- water
- march
- give
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
- G01S1/72—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using ultrasonic, sonic or infrasonic waves
- G01S1/725—Marker, boundary, call-sign or like beacons transmitting signals not carrying directional information
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
1,212,507. Acoustic beacon systems. PLESSEY CO. Ltd. 25 March, 1968 [31 March, 1967], No. 14868/67. Heading H4D. A submersible beacon generates at least two acoustic signals of different frequency; the lower or lowest frequency signal can be detected to give an approximate indication of beacon position and the higher or highest frequency signal can be detected to give a more precise indication. In the embodiment illustrated the beacon 1 has two transducers 1A, 1B which respectively transmit upwardly a broad 10 to 20 kHz beam and a narrow 50 to 400 kHz beam. Attenuation of the high frequency beam by the water reduces the risk of false homing on spurious signals reflected from the water surface and re-reflected to the surface from the water bottom. The different frequencies may be transmitted on a time-sharing basis. The beacon is moored to a lead acid power-supply battery 2 by a cable 4 and by a release mechanism which can be actuated by an acoustic signal from a surface vessel. An apertured dome resting on the bottom may be used to protect the beacon from bottom trawls.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1486867A GB1212507A (en) | 1967-03-31 | 1967-03-31 | Improvements in or relating to submersible beacon |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1486867A GB1212507A (en) | 1967-03-31 | 1967-03-31 | Improvements in or relating to submersible beacon |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1212507A true GB1212507A (en) | 1970-11-18 |
Family
ID=10048925
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1486867A Expired GB1212507A (en) | 1967-03-31 | 1967-03-31 | Improvements in or relating to submersible beacon |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1212507A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686385A (en) * | 2021-08-25 | 2021-11-23 | 哈尔滨工程大学 | Multi-frequency-band seabed ground reference station |
-
1967
- 1967-03-31 GB GB1486867A patent/GB1212507A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113686385A (en) * | 2021-08-25 | 2021-11-23 | 哈尔滨工程大学 | Multi-frequency-band seabed ground reference station |
| CN113686385B (en) * | 2021-08-25 | 2023-08-18 | 哈尔滨工程大学 | Multi-band submarine ground reference station |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |