RYA Day Skipper Coastal Navigation & Chart Work

Question 1

On an Admiralty chart, a depth sounding shown in bold italic figures indicates:

Accepted Answer

A drying height — the figure is the height above chart datum when dry

Answer

A depth in fathoms

Answer

A depth that is uncertain

Answer

A wreck

Question 2

What does a purple flashing light symbol with the annotation 'Fl(3)10s15m10M' indicate on a chart?

Accepted Answer

A light that flashes 3 times, has a period of 10 seconds, is 15 metres high, visible for 10 nautical miles

Answer

A light that is 10 seconds on and 3 seconds off at 15m height

Answer

A light visible from 15 miles that flashes every 3 seconds

Answer

A fixed light at 10m height visible for 15 miles

Question 3

A skipper plots a course of 135°T. Variation is 3°W and deviation is 2°E. What is the compass course to steer?

Accepted Answer

134°C

Answer

136°C

Answer

130°C

Answer

140°C

Question 4

What is the purpose of the 'estimated position' (EP) on a chart?

Accepted Answer

To show the vessel's best-estimated position using course, speed, and tidal data when no fix is available

Answer

To show the last confirmed GPS fix

Answer

To mark a waypoint

Answer

To indicate a dangerous shoal

Question 5

On a chart, a wreck is shown with a dashed outline. This indicates:

Accepted Answer

A dangerous wreck, the depth over which is unknown or less than 20 metres

Answer

A cleared wreck safe for navigation

Answer

A historical wreck with no navigational significance

Answer

A submarine cable

Question 6

A transit bearing consists of two charted objects in line. When is it most useful for pilotage?

Accepted Answer

To confirm you are on the correct leading line or track, as it requires no compass

Answer

To find your distance off the coast

Answer

To measure depth

Answer

To calculate tidal set