4. Supply the missing words using the words in the brackets:
courses · alter . sight · blast . risk . accordance · power · portside · rules · collision
Rule 17
When two vessels are in 1. of one another and 2. of
collision exists, the steering and sailing 3. provide for mutual action so
that 4. is avoided. Thus, when two 5.driven vessels
are meeting on reciprocal 6. so as to involve a risk of collision, each
is directed by Rule 14 to 7. course to starboard, so that each may
pass on the 8.of the other. Each vessel should indicate that she
is altering course to starboard by sounding one short 9. on the
whistle in 10. with Rule 34.