[QUOTE=xavierts29;55988]Does anyone have any info on the new T-Nav Test for a mate OSV 500 Ton? And Can anyone tell me where to find the solutions for these problems?
[FONT=luxi-sans-1][SIZE=2]You are to sail from Elizabethport, N.J., on 22 May 1983, with a maximum draft of 28 feet. You will pass over an obstruction in
the channel near Sandy Hook that has a depth of 26.5 feet. The steaming time from Elizabethport to the obstruction is 1h 40m.
What is the earliest time (ZD + 4) you can sail on the afternoon of 22 May and pass over the obstruction with 2 feet of clearance?
You want to transit Pollock Rip Channel, MA, on 6 April 1983. What is the period of time around the 0955 (ZD +5) slack in which
the current does not exceed 0.3 knot?
A. 0911 to 0955
B. 0940 to 1010
C. 0955 to 1044
D. 0935 to 1017
These problems can be solved using the tide and current tables 1983.
The first one you need to figure the depth over the obstruction you need (Height of tide 3.5ft ) and when that will occur based on Sandy Hook and then track backwards your 1 hour 40 minutes to get your sailing time. Remeber ZD+4 is Daylight Savings Time! Sounds Easy right? Well I couldn’t get that question right either…Altough I had no problems with any other tide problems. I really believe this question has the incorrect answer on the coast guard data base…Try seasources.net.
The second one is solved using the charts at the back of the tidal currents tables concerning duration of slack water…it’s pretty easy if you follow the instructions on the chart. You have to have the books though. I got my 500 Master Inland this summer and remember studying both these questions. I only had a few on the actual exam though. The CFRs are what stand out in my mind as being the toughest part…Good Luck, you can do it.