Horizontal sector of light .how far they extend in fwd and abaft beam direction ?

What does a submarine do when in distress ?

What will you do on seing a sono bouy ?

Principle of ais and time scheme ?

What is janus configuration ?

How will you measure viibilty @night without radar or any other source nearby ?

How will you calculate search area ?

What are tidal streams and what are ebb and flood tide ?

What is g.d.o.p ?

What is pythagorous error and why it is most dangerous ?

User clock error and how will you accompany for it ?

In which month sun is nearest to the earth ?

How will you fix position by v.s.a ?