Banner DF-G1-PR-Q7 Instrukcje Operacyjne Strona 124

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7 – Operating Procedure
DPN 402197 © TSS (International) Ltd Page 13 of 30
6. 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 starboard of the target
direction. The field will contain question marks if the 350 System cannot measure
the skew angle.
A2) Co-ordinates Data Packet – Forward Search mode
The string is 23 characters long with individual field definitions as follows. The SDC
logs all distances in units of centimetres and skew angles in units of degrees. The val-
ues in the packet are rounded and it is possible that they will not precisely match
those on the Forward Search screen.
Table 7–6: Internal logging format – Forward search mode
Notes:
1. The Start character is a colon.
2. The number of coils in the 350 System is always 6.
3. 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. For-
ward search mode works only if information is available concerning the height of
the coils above the seabed, and so this field will always contain information.
4. 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 con-
tain 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
5. 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 starboard of the target
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