ST60 Depth Issue

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Neil,

Proper operation of Raymarine depth sounding products require that depth of the water beneath the transducer be at least 3'. When operating in depths less than this value, the depth sounding product may report 2 to 3 times higher depth values (due to a second or third reflection of the the sonar ping from the water's surface) or may report -.- for the reported depth. While some may report operation in depths which are slightly less than this value, operators should not expect their depth sounding products to report a depth value when the depth of the water beneath the transducer is less than 3'. Bottom loss within a vessel subject to large heel angles (ex. a sailing vessel), may also occur when operating with a heel angle when sailing in deeper water.

Should the problem occur when the vessel is located in depth between 3' to 120' beneath the transducer and the vessel not be subject to heel a the time that bottom loss occurs, then it would be recommended that the depth instrument be tested with another transducer which has been suspended over the side of the hull. Should the problem persist using the test transducer, then the ST60 Depth instrument should be replaced (recommend replacing with an i50 Depth instrument), as Raymarine can no longer service ST60 instruments.