Isolated Danger Mark

Isolated Danger Mark

Isolated danger mark is a sea mark or buoy used to indicate a hazard to shipping such as a partially submerged rock. There is navigable water around the buoy.

Function:

Isolated danger mark is located or moored above a solitary hazard or as close as possible to a dangerous place, which indicating the position of a hazard. Ships should take the navigation information for reference and sail by avoiding the mark.

Application

coastal waters, islands etc.

Features of Isolated Danger Mark

Feature	Isolated Danger Mark
Color	Black, one or serveral central red stripes
Shape	Column or bar shape with top-mark
Top-mark	Two black balls
Character	White light, group flash twice, every 5s

Technical Parameters of Isolated Danger Mark

Specification	HS-1.08	HS-1.2	HS-1.5	HS-1.8	HS-2.4	HS-3.0	Note
Character	White light, group flash 2 times, every 5sedonds
Range	2-10km						Optional
Navigation Light Power	Solar Battery, 6VDC or 12VDC						Optional
Remote Control and Telemetry	Remote wireless, remote control and telemetry(with computer installation software)						Optional
Synchronous flash	GPS singnal coordination and synchronization ≤0.2ms						Optional
Buoy Body Diameter(m)	1.08	1.2	1.5	1.8	2.4	3
Top-mark	Two upper and lower vertical balck balls
Body Surface Color	Black, with one or serval red stripes in the middle
Buoy Material	Ship steel plate
Overall Height(m)	2.4	2.8	4	4.5	7.5	9.1
Freeboard Height(m)	0.3	0.45	0.5	0.6	1	1.3
Light Focal Plane Height(m)	1.4	1.62	2.35	2.46	4.5	5.8
Max. Swing Angle()°	≤15	≤15	≤15	≤15	≤15	≤15
Swing Period（s）	3~5	3~5	3~5	3~5	3~5	3~5
Max. Buoyancy(t)	0.8	1	1.8	3.14	7	11.7
Buoy Total Weight(t)	0.2	0.4	0.6	0.8	1.9	2.4
Antiseptic treatment	Paint Spraying, sacrificial anode protection
Anchor Cable Distribution System	17.5	17.5	22	28	34	38
Sinker/Anchor Block	0.5~1	0.5~1	1~2	2~3	3~6	5~8
Water Depth	3~15	3~15	4~20	6~30	10~50	20~60

Isolated Danger Mark

Diagram of Isolated Danger Mark