APPENDIX 2
NEW BLT TRANSDUCERS
A new type BLT transducer (Bolt-clamp Langevin Transducer) has been developed for this echo sounder. The BLT transducer has large bandwidth, good sound efficiency, compact structure and is reinforced for protection against slamming.
Transducer, thru-hull pipe and tank list
| Frequency | Transducer | Hull | Tank | Fasten inside | Fasten outside |
| (kHz) | Material | (Code No.) | hull (Code No.) | hull (Code No.) |
| |
| | | | | | |
| 28/200 | 28BL-6HR/200B-8B | Steel | T-693 | TWB-6000 (2) | TFB-7000 (2) |
| | | (000-015-044) | (000-015-207) | (000-015-209) |
| | | |
| | | | | | |
| | | FRP | T-693F | TRB-1100 (2) | - |
| | | (000-015-241) | (000-015-219) |
| | | | |
| | | | | | |
| 38/200 | 38BL-9HR/200B-8B | Steel | T-693 | TWB-6000 (2) | TFB-7000 (2) |
| | | (000-015-044) | (000-015-207) | (000-015-209) |
| | | |
| | | | | | |
| | | FRP | T-693F | TRB-1100 (2) | - |
| | | (000-015-241) | (000-015-219) |
| | | | |
| | | | | | |
| 50/200 | 50BL-12HR/200B-8B | Steel | T-693 | TWB-6000 (2) | TFB-7000 (2) |
| | | (000-015-044) | (000-015-207) | (000-015-209) |
| | | |
| | | | | | |
| | | FRP | T-693F | TRB-1100 (2) | - |
| | | (000-015-241) | (000-015-219) |
| | | | |
| | | | | | |
| 28/38 | 28BL-12HR/38BL-15HR | Steel | T-681 | TWB-6000 (2) | TFB-7000 (2) |
| | | | (000-015-849) | (000-015-207) | (000-015-209) |
| | | FRP | T-681F | TRB-1100 (2) | - |
| | | (000-015-850) | (000-015-219) |
| | | | |
| | | | | | |
| 28/50 | 28BL-12HR/50BL-24HR | Steel | T-681 | TWB-6000 (2) | TFB-7000 (2) |
| | | | (000-015-849) | (000-015-207) | (000-015-209) |
| | | FRP | T-681F | TRB-1100 (2) | - |
| | | (000-015-850) | (000-015-219) |
| | | | |
| | | | | | |
| 38/50 | 38BL-15HR/50BL-24HR | Steel | T-681 | TWB-6000 (2) | TFB-7000 (2) |
| | | | (000-015-849) | (000-015-207) | (000-015-209) |
| | | FRP | T-681F | TRB-1100 (2) | - |
| | | (000-015-850) | (000-015-219) |
| | | | |
| | | | | | |
| 28/88 | 28BL-12HR/88F-126H | Steel | T-682 | TWB-6000 (2) | TFB-7000 (2) |
| | | (000-015-851) | (000-015-207) | (000-015-209) |
| | | |
| | | | | | |
| | | FRP | T-682F | TRB-1100 (2) | - |
| | | (000-015-852) | (000-015-219) |
| | | | |
| | | | | | |
| 38/88 | 38BL-15HR/88F-126H | Steel | T-682 | TWB-6000 (2) | TFB-7000 (2) |
| | | (000-015-851) | (000-015-207) | (000-015-209) |
| | | |
| | | | | | |
| | | FRP | T-682F | TRB-1100 (2) | - |
| | | (000-015-852) | (000-015-219) |
| | | | |
| | | | | | |
AP-2