5.1.1 Each
mooring system and tethering arrangement is to be considered for the
following design cases:
-
Case 1 - In-service
operational.
-
Case 2 - In-service
berthing.
-
Case 3 - Out
of service - severe environmental conditions.
5.1.2
Case
1. Each system is to be adequate for the worst combination
of normal operational wind, current and wave loadings, together with
one of the operational loads in Pt 3, Ch 7, 4.2 Operational loads.
This can be represented by the following expression:
where the above loads are added vectorially.
5.1.3
Case
2. Each mooring system and tethering arrangement is to be adequate
for the worst combination of normal operational wind, current and
wave loadings, together with the normal berthing force including the
effects of the ship's propulsion units, where appropriate. This can
be represented by the following expression:
where the above loads are added vectorially.
5.1.4
Case
3. Each mooring system and tethering arrangement is to be adequate
for the worst combination of extreme wind, current and wave loadings
together with any wash effects from passing ships, where appropriate.
It is assumed that in this condition the linkspan will be out of service
and no ship will be berthed or berthing. This is represented by:
where the above loads are added vectorially.