OCIMF_Mooring_Equipment_Guidelines_(Second_Edition)

'S"

.

I

f. .. i

25 '

1~rn~

• ---*-
  ~--...f.-=-""""-·T i1t,k _ ~ ___ J 1

Uo

lAIdog PfoaJonn ~UIt{S

....-.. qIeIOf l"" lrW _ _ 10_

... -~- .. ~--

~1TOSCAl£

FIGURE 2.10: IDEALISED MOORING LINE LAVOUT

2.6 APPROXIMATE METHODS FOR DETERMINING

MOORING RESTRAINT REQUIREMENTS FOR

TANKERS AND GAS CARRIERS UNDER

STANDARD ENVIRONMENTAL CRITERIA

In practice it is often necessary to evaluate a ship's mooring e!juipmeDt without tbe detailed knowledge
of all ship and benb parameters. For this purpose tbe formulae quoted in this Section may be used.
providing the underlying assumptions on which they are based are applicable.

The formulae are developed on the philosophy that spring line restraint should be proportional LO
the maximum longitudinal force on the ship due to che standard environmental loads, and the brCJlst
line rest.raint should be proponional to tbe maximum transverse forces at the ship perpendiculars.
Although this approach does not consider the variations in actual mooring patterns. it provides a
rational "scale" for mooring reslraint systems of different size ships, and as such is more realistic