Raytheon ST60 - Shallow alarm lock; Speed; Set speed units; Set speed resolution

Chapter 4: Calibration 31
• 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.
Speed
To calibrate the speed functions:
1. With the User calibration entry screen displayed, press the speed
key.
2. Referring to the User calibration - speed illustration, carry out the
calibration procedure. Use the speed key to cycle from screen to
screen and the trip and reset keys to set the required values at
each screen (except Adjust to SOG display).
Set speed units
Select either KTS (knots), MPH (miles per hour) or KMH (kilometres per
hour), as required.
Set speed resolution
Select resolution of either 0.01 or 0.1 as required.
Set log units
Select either NM (nautical miles), SM (statute miles) or KM
(kilometres), as required.
Setting the correct speed
Set the displayed (current) speed using one of the following methods:
• Use the Adjust to Speed Over Ground (SOG) screen to
automatically set the current speed to SOG (if available from
SeaTalk). You must be running in slack tide conditions to
successfully use this method.
• Manually apply a calibration factor by means of the Cal factor
adjust screen, to set the displayed speed value to your best estimate
of the vessel’s speed.
040_2c04.p65 09/08/99, 09:3231