hoist 2 (numerical) flag den 1st substitute den answering pendent den 2nd substitute...
Distress signal indicates that a mobile is in grave and imminent danger and requires immediate assistance
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
A functional radars, VHF, Echo sounder, AIS, Logs, Gps, Ecdis..etc