Raymarine ST70+ Operating Manual

Also see for ST70 Instrument: Installation guide User reference guide User reference handbook Installation guide Operating guide

Contents

Raymarine ST70+ Operating Manual Manual pdf 54 page image

46 ST70+ User Reference ManualRudder dampingIf the autopilot is ‘hunting’, i.e. continuously moving the steering backwards andforwards by small amounts, use the Setting rudder damping procedure inChapter 3:Setup Information to improve autopilot stability.Setting AutoTrimAutoTrim determines how quickly the autopilot applies ‘standing helm’ to correct fortrim changes, caused, for example, by changes in the wind load on thesuperstructure, or an imbalance of engines.Increasing the AutoTrim level reduces the time the autopilot takes to return to thecorrect course, but makes the boat less stable. If the autopilot:• Gives unstable course keeping and the boat ‘snakes’ around the desired course,decrease the AutoTrim level.• Hangs off course for excessive periods of time, increase the AutoTrim level.If necessary, use the Setting AutoTrim procedure in Chapter 3:Setup Information toimprove autopilot performance.2.6 After commissioningWhen the dockside setup and open water calibration have been completed, and youhave returned to normal operation, your ST70+ instrument and autopilot systems areready for use. Refer to the ST70+ Operating Guide for instructions on how to useST70+ on a day-to-day basis.Before using the autopilot system you should thoroughly familiarize yourself with itsfunctions and ensure you know how to use it correctly. It is important to:• Read the ST70+ Operating Guide.• Carry out trial runs under autopilot control, in familiar waters away from othervessels and obstructionsCAUTION: Any additional changes you make to your system settings mayrequire you to repeat the calibration process.EMC ConformanceAlways check the installation before going to sea to make sure that it is not affected byradio transmissions, engine starting etc.To do this:1. Turn on all transmitting equipment (radar, VHF radio etc.).2. Check that all electronic systems are unaffected by the transmitting equipment(e.g. without undue interference).