Raymarine ST60 Tridata - Manual (Page 42)

30 ST60 Tridata Instrument Owner’s Manual
depth from the water line. In order to do this, you need to know the
vertical separation between the transducer position and:
• The bottom of the keel.
• The water line.
Use the trip (decrement) and reset (increment) keys to set the required
offset value:
• If you want to display the depth reading from the transducer, set a
value of 0.0.
• If you want to apply a water line offset, adjust the displayed reading
until the appropriate positive offset value is shown.
• If you want to apply a keel offset, adjust the displayed reading until
the appropriate negative offset value is shown.
Shallow alarm lock
When set to on, prevents alteration to the shallow depth alarm threshold.
Offset value
of 0.0
+ve offset
values
-ve offset
values
D4352-2
Depth offsets
81040_1.book Page 30 Thursday, November 7, 2002 10:21 AM