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Doppler Log general formula with only one transducer- A transducer is fitted on the ship’s keel which transmits a beam of acoustic wave...

PRINCIPLE Doppler log is based on the principle of “Doppler Shift Effect”, i.e., apparent change in frequency received (from what was...

What actions to be taken When Approaching in fog in the open sea?

When heavy weather is expected, the ship would roll, pitch, yaw, sway, surge and heave. This movement in six degrees of freedom would...

ON ALL SHIP TYPES: 1. Compare compasses soon after taking-over watch. Autopilots usually have a "Magnetic Compass Off Course Alarm"....

Testing of autopilot in the manual mode: The reason for this: The autopilot normally uses very minor angles of the helm while maintaining...

Magnetic off course alarm The gyrocompass may sometimes wander. This could be caused by faults in the system or by...

The ADMIRALTY Information Overlay (AIO) contains additional information which is considered navigationally significant and can be used in...

How to take merpass sight- we will solve this question as an oral question- First, we need to find out the approximate merpass time in...