When approaching Block Island Sound from Long Island Sound，you will enter waters governed by the International Rules of the Road when you（）.

The term of Landfall means（）.

Which instrument is used to predict the approach of a low pressure system（）.

In the absence of a route leading from seaward，the conventional direction of buoyage generally follows（）.

You are entering an east coast port and see a buoy with a yellow triangle painted on it.This indicates（）.

Which nautical charts are intended for coastwise navigation outside of outlying reefs and shoals（）.

You are making tow.A loaded，open-hopper barge with independent tanks has placards，with alternating red and white quadrants，located at each side and end.You inspect the barge and find slight traces of water in the wing voids due to condensation.What（）.

The approach to the roads and harbor from the（）entails no difficulty.

Preferred channel marks are colored with（）．

Two vessels are approaching each other near head on. What action should be taken to avoid collision?（）.