holding ground - The type of bottom that the anchor is setset in.
holding tank - A storage tank where sewage is stored until it can be removed to a treatment facility.
Holding Ground The type of bottom for anchor, i.e. good or bad holding ground.
Holiday An unpainted or unvarnished spot in a vessel.
Hounds band A band around the mast with securing eyes for attaching the lower stays.
holding ground
The water's bottom in which a boat is anchored. Good holding ground provides a strong bite for the anchor flukes, poor holding ground is rocky, weedy, or mushy.
holding power ...
[edit] Is the seabed good holding ground?
Charts should indicate the type of bottom, and a sounding lead may be used to collect a sample from the bottom for analysis.
Mud and hard sand are good holding ground, whilst shingle and soft sand are not. Care must be taken to drop anchor where there is no chance of fouling other tackle.
Scope
The ratio between the length of the anchor rode and the depth of the anchor. A scope of 7:1 is usually used, depending on the holding ground. Too little scope can cause the anchor to drag.
Screw
A propeller.
For example 100 feet of anchor rode in 20 feet of water would be a scope of 5:1. A scope of 7:1 or more is usually used depending on the holding ground. Too little scope can cause the anchor to drag. Increased scope increases the swinging room.
Trestles can be improvised, but some are carried, ready for use, by mobile engineer units and they are frequently combined with pontoon bridges at the shore ends, where holding ground for the feet of the trestles is found.
 See also: Boat, High, Rope, Point, Bow
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