4 – Operating Procedure
DPN 402197 Issue 7.1
© Teledyne Limited
4- 11
NOTES:
❐
The Start character is a colon.
❐
The number of coils in the 350 system is always 6.
❐
Coil altitude (ALT) information comes from an altimeter if the system includes
one. Otherwise, the information in this field will be the fixed coil height if
available. Forward Search mode works only if information is available con-
cerning the height of the coils above the seabed, and so this field will always
contain information.
❐
The Forward Search range to the target (FWD) is the estimated distance
from the coil array to the target. There are several conditions that will cause
the field to contain question marks:
❐
The target is out of range
❐
The 350 system cannot compute an accurate position for the target
❐
Coil saturation has occurred because the tone signal is too strong
❐
Skew angle between the target and the ROV in the range –90° to +90°. Zero
skew is the ideal situation where the ROV aligns on the same heading as the
direction of the target. Skew is positive when the ROV heading is to star-
board of the target direction. The field will contain question marks if the 350
system cannot measure the skew angle.
B) Signals Data Packet (both operating modes)
The string is 34 characters long with individual field definitions as follows. DeepView logs all signal
voltages in units of microvolts.
Table 4-7: Internal logging format – Signals packet
NOTE
❐
The Start character is a colon.
