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Isolated Danger Mark Buoy

Isolated danger mark buoy is used to indicate a hazard to shipping such as a submerged rock or wreck which has navigable water all around it. It is erected or moored above the hazard. Thus the vessel should keep away from the buoy when navigation.

BASIC INFO

Introduction :

An isolated danger mark buoy is used to indicate a hazard to shipping, and it is placed on, or near to the hazard, thus the vessel should keep away from the buoy when navigating.

Description :

Isolated Danger Mark  
Colour Black with one or more broad horizontal red bands
Buoy Shape Optional, but not conflicting with lateral marks; pillar or spar preferred
Topmark 2 black spheres, one above the other
Light Colour (when fitted) White
Light Rhythm (when fitted) Group flashing (2)

Specification :

Model Diameter
(mm)
Buoying Depth (mm) Freeboard
(mm)
Focal Plane Height
(mm)
Net Weight
(kg)
Height(mm) Reserve Buoyancy (kg)
IDM800 800 2-10 45 1580 195 2628 230
IDM1200 1200 3-15 510 2040 550 3380 570
IDM1500 1500 4-20 632 2524 681 4300 1012
IDM1800 1800 6-30 722 3031 1686 5134 1546
IDM2100 2100 8-40 800 3518 1900 5757 2450
IDM2400 2400 10-50 920 4040 2973 6930 4015
IDM3050 3050 15-60 1114 5164 3490 9610 7646
IDM3500 3500 20-70 1240 6090 3863 8520 11380
Hall Thickness Mooring Chain Sinker Specification The Maximum swaying angle≤15°
Buoy
(m)
Thickness
(mm)
Buoy
(m)
Mooring Chain (mm) Buoy
(m)
Sinker
(t)
1.2 10 1.2 17.5 1.2 0.5-1
1.5 10 1.5 22 1.5 1-1.5 Sunproof grade:8
1.8 15 1.8 28 1.8 2-3
2.4 15 2.4 32 2.4 3-6
3 15 3 38 3 5-8
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