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Emergency procedure for gyro compass and bridge telegraph failure

Gyrocompass An electrically-driven gyroscopic disc spinning at extremely high speed which keeps its relative axis in relation to space.

Gyro failure : The following actions are suggested as a minimum in event of failure of vital bridge equipment gyro compass.


1) Inform to the Master

2) If the 2nd gyrocompass is available, activate it. Otherwise, following measures to be taken.

3) Change over to Hand steering for steering with magnetic compass with applying Compass deviation value with Deviation curve and observation, or to TMC (Transmitting Magnetic Compass) Autopilot, where fitted.

Laden containership on coastal navigation
Laden containership on coastal navigation

4) Consider effect on other navigational and communication equipment which have a gyro feed especially Radar/ ARPA and ECDIS and enter headings manually.

5) Plot positions more frequently to confirm course made good and accordingly allow correction to course steered. In coastal waters, make good use of parallel indexing technique to keep vessel on charted track.
Also secure True course run (Course made good) by plotting GPS position and verify with Heading of Magnetic compass.

6) Reduce speed if considered necessary.

7) In the meantime, to check Instruction Manual for troubleshooting guide.

8) Inform to the office, to enable to arrange repair at next port

9) Caution pilots at next port, about Gyro unavailability.

Bridge Control Telegraph Failure

Inform to the duty in E/R and C/E, and then switch to Engine Room Control

Inform to the Master

Establish Emergency Communication with E/R

E/R to be in Manned condition

If unable rectify, to advise to the office for arranging repair.

Compass adjustment The process of placing magnets and iron masses so as to neutralize the effect of magnetism existing or induced in the ship hull, with the purpose of correcting the error so caused and bringing the compass needle to point as nearly as possible to the magnetic north.



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