Normally, Once we dropped anchor to the seabed it will be followed by splashing the anchor buoy to the water. Well, to identify whether the anchor is drag or not, we have to figure out what is the normal radius of the pennant buoy from the drop point so that it will be easy for us to realize it. Here below, I try to show you how to calculate it by using simple phytagoras formulae.
R= Buoy Radius
w= Length of wire
d= depth of water
Example: water depth is 45 meters and pennant wire lenght is 90 meters so the radius will be 44.7 ~ 45 meters
If the actual radius is greater than tolerance radius calculated and getting shorter to the barge/rig, means the anchor has experiencing for dragging. In this case, we have to reposition the anchor immedietly to avoid any danger such as submarine pipelines surrounding.
It is simple..isnt it..? you can practice now.
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