Chapter 1: Operation; Operating Procedures; Silencing Alarms - Raymarine ST40 Depth Instrument Owner's Handbook Manual

Chapter 1: Operation

Chapter 1: Operation
Your ST40 Depth instrument:
• Provides depth information, in either feet (FT), metres (M) or
• Records the minimum depth encountered during the period it is
• Enables you to define alarm thresholds for shallow water, deep
• Enables you to see what offset is applied to the depth reading.
CAUTION
Your instrument is calibrated to factory (default) settings when
first supplied and must therefore be calibrated before use, to
ensure optimum performance on your vessel. Do NOT use the
instrument until the calibration procedures have been
satisfactorily completed, using the procedures in Chapter 4,
Calibration.
Coloured bezel and Desktop Mounting Bracket options are available
for your ST40 instrument. Contact your Raymarine dealer for further
information.

1.1 Operating procedures

Operating information is presented in flow chart form. The flow charts
show the various operating screens and key presses necessary to carry
out the various instrument functions. Key presses are momentary unless
otherwise stated.
Note that:
• Up/down depth-trend arrows are displayed, if the seabed is rising or
• The minimum depth reading is reset to zero at power up.

Silencing alarms

To silence an alarm (see the Alarms section, later in this chapter),
momentarily press any one of the instrument keys.
fathoms (FA), as set during User calibration (see Chapter 4,
Calibration).
switched on. You can reset this at any time.
water, shallow anchor and deep anchor.
falling at a significant rate.
1