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How to enter Transceiver & Lodestar Offsets for Optimised USBL
31 May 2022
This describes the offsets to be entered for transceiver and Lodestar when configured for Optimised USBL in Ranger 2 or Marksman software, when using a standard-length Type 7950 Deployment Machine.
This document assumes that the Type 7950-400 Lodestar mounting bracket (part no: 875-2488) is used, shown in blue in the sketch below, and mounted to the guide plate on top of the pole.
Dimensions of a standard Type 7950 Deployment Machine are shown below.
However, to calculate Lodestar to transceiver height offsets, further details are required.
| Item | Height |
| Deployment Pole (Standard) | 4590 mm |
| Transceiver Insulation Flange | 10 mm |
| Lodestar Mounting Bracket thickness | 6 mm |
| Guide Plate thickness | 10 mm |
| TOTAL | 4616 mm |
Typically, two types of transceiver are fitted to the Deployment Pole:
- Type 8142-000-01 HPT 5000
- Type 8142-000-02 HPT 7000
| Transceiver | Height |
| Type 8142-000-01 HPT 5000 | 322 mm |
| Type 8142-000-02 HPT 7000 | 391 mm |
The Lodestar has a centre-of-axis point, and this should be used as its height offset.
Contact Support@sonardyne.com for more information.
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