Raymarine Autohelm ST 30 - Manual (Page 28)

Chapter 4: Operation 25
Chapter 4: Operation
4.1 General
This chapter describes the operational features of the ST30 Compass
using sample displays and text references.
Points to remember...
All key presses are confirmed by a single beep. This audible confirmation
cannot be turned off.
The ST30 Compass cannot receive or transmit NMEA data directly.
If linearisation has not been carried out, the small CAL legend flashes for 1
minute every time the ST30 Compass is powered up. The accuracy of the
heading display cannot be guaranteed until linearisation has been
completed.
4.2 Heading Mode
This is the default mode of operation and is always displayed in degrees
magnetic. North, relative to your compass heading, is displayed as a
graphic to the left of the heading.
LOCK
COMPASS
LOCK
HEADING
AVERAGE
D1795-1
N