What is a gel cell battery and how is it maintained & cared for?

A 4 digit multi-meter with an accuracy of 0.15% and 2 counts is set on the 60 vo...

What inputs are normally required for an Auto Pilot?

what is the maximum signal voltage range that an NMEA-0183 unit must be capable...

Which of the following statements concerning power supply filters is true?

The antenna tries to initialize then points straight up and stops. What is the m...

What is the purpose of the BFO?

A received signal on a MF/HF transceiver breaks up rapidly and repeatedly. The s...

If the vessel is beyond range of NAVTEX broadcasts and the Sat-C system fails, t...

Which of the following conditions indicate the proper operation of a 150 Watt MF...

The antenna creeps up and down after initialization. What action would you take?