Raymarine Raydata Installation And Operating Handbook
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Contents
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Chapter 5: Alarms 35Chapter 5: Alarms5.1 IntroductionThis chapter explains how to set alarm limits and turn alarms on and off,and how to handle alarms when they activate.The alarm values that you set are limits. If the value received from asensor falls outside the range set by the upper and lower alarm values,the result is an active alarm condition which is reported with a visualmessage and, depending on your setup selection, an audible signal.You can turn an alarm off so that it will not activate. In this case, thealarm limit value is retained, and redisplayed when you turn the alarmon again.The RayData provides the following types of alarm:• Shallow depth alarm, which is activated when the water is shallowerthan the specified depth . Set this alarm to a value greater than thedepth at which you will ground, to allow yourself time to respond tothe alarm; allow a greater margin if you are in areas where the bottomcan shelve steeply.• Deep depth alarm, which is activated when the water exceeds thespecified depth. This is useful when locating fishing grounds, or whenmoving offshore away from coastal waters.• Anchor alarm, which is activated when the depth becomes morethan or less than the values you have specified. In addition to itsusefulness in monitoring the depth of the anchored position, theanchor alarm can also be used to help you maintain position on asuitable depth-limited fishing ground, without having to reset thenormal shallow and deep alarm limits.• Temperature alarm, which is activated when the surface seatemperature becomes more than or less than the values you havespecified. This alarm is useful for locating warm currents or streamsfor fishing, or to let you know when the water temperature is suitablefor swimming.Note: When repeating depth and temperature information from NMEA,the alarm settings have no effect. |
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