Practice
Exercises
Work chartwork on paper with the almanac, guides and the printable Training Chart 1 PDF, then let the engine mark you — or drill the knowledge bank and sit timed-feel mock papers. Sign in to keep scores on your dashboard.
Tides
Height of tide
Using the Port Merrow tide tables in the almanac, find the height of tide at 17 Feb, 07:15 UT. Work it on paper with the curve, then check.
Secondary port
HW at Brixhaven
Port Merrow HW is 13 Feb, 14:27 UT, 4.5 m (range 2.6 m). Apply the Brixhaven differences from the almanac: when is HW there, and how high?
Streams
Course to steer
Departing 30 Jul, 14:00 UT at 5 kn from 49.493N 6.210W to 49.393N 6.176W on Paris Sound. Use ◆B and the almanac. What course do you steer (°T), and what SOG do you make?
Chartwork
Estimated position
At 01 Feb, 16:00 UT your fix is 49.409N 6.180W. You steer 135°T and the log reads 6.1 nm after one hour. Using ◆B and the almanac for that hour's stream, plot your EP.
Anchoring
Will you stay afloat?
You anchor near Port Merrow at 09 Aug, 17:00 UT with 7.9 m on the echo sounder. Your draught is 1.9 m. How much water will you have at the next low water?
Tidal gate
When does the gate open?
You need 3.0 m of tide at Port Merrow to cross the bank. From 03 Nov, 06:00 UT, when does the height first reach it?
Compass
True to compass
Your plotted course is 190°T on Paris Sound (variation 3.4°W). Using the deviation card below, what do you steer on the compass?
| 000 | 045 | 090 | 135 | 180 | 225 | 270 | 315 |
|---|---|---|---|---|---|---|---|
| 4W | 2W | 1E | 3E | 4E | 2E | 1W | 3W |
Chartwork
Three-bearing fix
On Paris Sound (variation 3.4°W) you take hand-bearing compass bearings of three charted marks:
- Brixhaven: 068°M
- No.2: 254°M
- Paris SWM: 210°M
Convert to true, plot the position lines from each mark, and fix your position.