Radar, ECDIS

Question 1

Radar errors

Answer 1

Indirect Echo
Multiple Echo
Side Lobe Error
Second Trace

Question 2

Radar performance

Answer 2

BRG within 1*
RNG within 1% of scale or 30m whichever is less
Fully operational within 4 minutes from cold
Distinct representation of two targets on same bearing within 40m of each other

Question 3

ECDIS mandatory alerts

Answer 3

Passing within a set distance of the Safety Contour
Different geodetic datum
Deviation from route
Approaching critical point
Failure of positioning system

Question 4

ECDIS optional alerts

Answer 4

ECDIS Malfunction
Passing within a set distance of a danger in route monitoring mode
Passing within a Set distance of an area with Special Conditions

Question 5

ECDIS other alerts

Answer 5

Information overscale
Larger scale ENC available
Different reference system
Customised display
No ENC available

Question 6

ECDIS Special Areas?

Answer 6

PSSA
Areas to be avoided
Inshore Traffic Zone
Traffic Separation Zone
Restricted Area
Caution Area
Military Practice Area