The following questions are to be answered by plotting on chart 12221 TR, Chesapeake Bay, and using the supporting publications.
The following information is applicable to all questions.
(The abbreviation "psc" stands for "per standard magnetic compass".)
VARIATION IS 9° W
At 0919 you are in Chesapeake Channel between Trestle B and Trestle C of the Chesapeake Bay Bridge and Tunnel. What is your ETA between York River Entrance Channel Buoys "17" and "18" if you are making 11.3 knots?