A functional radars, VHF, Echo sounder, AIS, Logs, Gps, Ecdis..etc
hoist 2 (numerical) flag den 1st substitute den answering pendent den 2nd substitute...
2 pd vsl head on...one got shallow water n stbd side.
any speed at which we can safely navigate in that area
any speed at which we can safely navigate in that particular area
It is a speed at which one can take proper n immediate action to avoid collision n b stopped at a distance appropriate in prevailing circumstances n condition