(excerpt from Regulations about way of marking of waterways and aids to navigation)
New navigational hazards are newly discovered naturally or as a result of technical-technological accidents or incidents appeared obstacles or dangers that have not yet been drawn and described in official maritime navigational charts and publications and have not been published in the »Notice to Mariners«, such as sandbanks, reefs, wrecks and similar to.
The new navigational danger mark shall be placed as close as possible to the hazard or in the area around it, within the area where another mark will subsequently be placed and shall remain in place until the following conditions are cumulatively met:
- until the new navigational hazard is promulgated by broadcasting Maritime Safety Information by radio, published in the »Notice to Mariners« and drew and described in official maritime navigational charts and publications
- until a complete hydrographic survey of the new navigational hazard is performed, which includes data of position and the minimum depth above it
- until the new navigational hazard is permanently marked.
The new navigational hazard is marked by:
- lateral system mark, cardinal system mark, isolated danger mark or
- special new danger mark.
The new navigational danger mark has the shape of a pillar or spar, colored with an equal number of yellow and blue vertical stripes (minimum 4 and maximum 8 stripes), and may have a sign at the top - a yellow cross (»+«) pointed upright.
The suitability of marking the new navigational hazard with the specified mark is determined by the Harbor Master's Office.
Wrecks and other new hazards that float directly on the surface are also marked by a radar reflector.
The light of the new navigational danger mark shall be alternating blue and yellow flashing lights, with a minimum range of 4 nautical miles, with blue and yellow flashes of 1 second duration that alternate at 0.5 second intervals.
If the new navigational hazard is marked with more than one lighted marks, then the lights must be synchronized.
Beside the above mentioned marking, the Harbor Master's Office may, by a decision, determine the marking of the new navigational hazard by RACON Morse sign "D" (- ..) and / or by na AIS AtoN device.
NAUTICAL CHARACTERISTICS OF NEW NAVIGATIONAL DANGERS MARKS
|New navigational dangers marks
||Yellow and blue stripes (minimum 4, maximum 8)
||Any, but different from other shapes of navigational marks
||Yellow »+« shape
||Blue and white flashes
||Alternate (RACON Morse ''D'', if any)