Rule 19 & Rule 6

Question 1

What factors additionally should vessels with operational radar take into account

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Answer 1

• Characteristics, efficiency and limitations of the radar equipment;
• Any constraints imposed by the radar range scale in use;
• The effect on radar detection of the sea state, weather and other sources of interference
• The possibility that small vessels, ice and other floating objects may not be detected by radar at an adequate range;
• The number, location and movement of vessels detected by radar
• The more exact assessment of the visibility that may be possible

Question 2

If a vessel detects by radar alone the presence of another vessel and a close quarters situation is developing she must take avoiding action.

What should be avoided as far as possible if she alters course?

Answer 2

so far as possible, the following shall be avoided:

i. an alteration of course to port for a vessel forward of the beam, other than for a vessel being overtaken

ii. an alteration of course towards a vessel abeam or abaft the beam

Question 3

List 6 things that the OOW should do on encountering restricted visibility

Answer 3

• Call the master
• Start fog signal
• Post lookout
• Check gain & tuning on Radar
• Have engines ready for manoeuvre
• Make an entry in the log book

Question 4

In rule 19 what actions should be taken upon encountering restricted visibility?

Answer 4

proceed at a safe speed

have her engines ready for immediate manoeuvre

Question 5

What factors should all vessels take into account when determining a safe speed?

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Answer 5

The state of visibility

The traffic density including concentrations of fishing vessels or any other vessels

The manoeuvrability of the vessel

At night the presence of background light

The state of wind, sea and current, and the proximity of navigational hazards

The draught in relation to the available depth of water