Navigation and Seamanship (1+1)

4.3.5.4.2. New danger mark

It should be specially noted that a ‘new danger’ which is one not yet shown in nautical documents, may be indicated by exactly duplicating the normal mark until the information is sufficiently promulgated. A new danger mark carry a Racon coded Morse ‘D’. Attention is being drawn to the fact that a "new danger" that has not yet been announced in nautical documents may be indicated with a duplicating mark being identical (in all details) with the principal mark. The duplicating mark should stay until the news about the new danger has been adequately announced. The "new danger" mark should be equipped with a Racon sending out the letter "D" in the Morse Code

The emergency wreck marking buoy will remain in position until: a) the wreck is well known and has been promulgated in nautical publications; b) the wreck has been fully surveyed and exact details such as position and least depth above the wreck are known; and c) a permanent form of marking of the wreck has been carried out.
The buoy has the following characteristics:

· A pillar or spar buoy, with size dependant on location.

· Coloured in equal number and dimensions of blue and yellow vertical stripes (minimum of 4 stripes and maximum of 8 stripes).

· Fitted with an alternating blue and yellow flashing light with a nominal range of 4 nautical miles where the blue and yellow 1 second flashes are alternated with an interval of 0.5 seconds.
B1.0s + 0.5s + Y1.0s + 0.5s = 3.0s

· If multiple buoys are deployed then the lights will be synchronized.

· A racon Morse Code “D” and/or AIS transponder can be used.

· The top mark, if fitted, is a standing/upright yellow cross .