8.0 Operations after dark

All after dark operations should be carried out with extreme caution. No solo operation of departmental vessels is permitted. Limited night vision may give a false impression of the water conditions and the normal signs associated with a weather change will not be visible. In addition, the risks associated with working close to shore, submerged reefs or working in strong currents will be increased due to limited visibility.

The operator must be familiar with the area in daylight hours before attempting to work there after dark and must plan how to use any navigational beacons. Prior knowledge of their positions will make night navigation easier.

All boats must follow normal operating procedures and be equipped as indicated above. In addition the following must be carried/used:

• Navigational lights as specified for class of boat
• VHF radio
• Each crew member must carry a light source ("Cyalume" stick, torch, strobe)
• Compass and, if available, chart of the area
• If operations include diving, the appropriate "Diver Below" lights must be exhibited

8.1 Restrictions applying to areas of use for after dark operations

Sheltered Waters

• Both dinghy and runabout classes of boat may operate in this area.
• Operations at night may only be carried out when lighted navigation aids are visible, or when temporary lighted marks have been established.

Open water

• Runabout class vessels only may be used in this area
• A GPS/Plotter is strongly recommended when operating in these areas

All diving from small boats at night must comply with the rules stated in the University of Otago Diving CoP.

Due to the additional difficulties associated with mounting a night time search it is doubly important that the rules concerning shore communication, observance of ETAs and intentions boards are strictly adhered to.