Chapter 4: Calibration; Introduction; Emc Conformance; Speed Readings - Raymarine ST60 Owner's Handbook Manual

Chapter 4: Calibration

Chapter 4: Calibration

4.1 Introduction

The ST60 Speed instrument is set up with factory-programmed default settings, so
in order to optimise the performance of the instrument on board a particular
vessel, the procedures in this Chapter must be carried out immediately after the
completion of installation, and before the equipment is used for navigational
purposes.
Where practicable, the calibration procedures are presented diagrammatically to
show the sequence of key presses and the resulting displays. Adjustment
instructions are given where applicable.

EMC conformance

Always check the installation before going to sea to make sure that it is not
affected by radio transmissions, engine starting etc.

Speed readings

One of the most important reasons for calibrating the ST60 Speed instrument is to
ensure that speed readings displayed on the instrument are a true reflection of the
actual speed of the vessel.
In User calibration, you can:
• Automatically set the displayed speed reading to be the same as the Speed
Over Ground (SOG) (if SOG data is available).
• Manually apply a calibration factor, to set the displayed speed to the required
value.
If neither of the above methods are suitable, you can carry out a speed calibration
run over a measured distance, to enable the instrument to calculate the correct
calibration factor. This is described as part of
Intermediate calibration
25
.