March 2018
rapidCAST User’s Guide
Page
42
EAR-Controlled Technology Subject to Restrictions Contained on the Cover Page.
Comm Position
The Comm position is where the probe antenna is out of the water and is able to communicate with the
Bluetooth antenna. The front of the probe is in the water to maintain stability.
To define the Comm Position:
1. Move the boat forward at the desired survey speed.
2. Move the probe to where the probe antenna (the black portion of the probe) is out of the water.
3. Click the Jog and Teach tab on the rapidCAST Interface software.
4. Click Comm and then click the Teach Button. On the Record Position dialog, click OK.
Figure 33.
Comm Position
The Comm Position will be closer to the vessel at slower speeds and farther out at higher
speeds due to the hydrodynamic characteristics of the probe.
The Comm Position may require updating during operation due to the line packing effects on
positional accuracy. As the line is wetted and tensioned during recovery, the Comm Position
could drift and will be further away from the ship than the intended position. In this case, re-
define the Positions and continue the survey.
