Raymarine C140w - Manual (Page 170)

Menu Item Description Options
Depth Offset
(waterline) Offset represents
the depth of the
transducer (relative
to the waterline). —9.9 to +9.9 feet
Speed Offset Offset applied to the
speed log. 0 to 100%
Temperature Offset Offset applied to the
temperature transducer
value. —9.9 to +9.9 °F
170 C-Series Widescreen user reference