Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length.

[Edmund]

Can someone please tell me what a docking plan is?

ta, Ed. 

[Dreadstar]

I think this is what it means:-

Term   Definition
docking plan :-   a plan showing the form of the bottom and the location of appendages, sea chests, overboard discharges, underwater valves, drain plugs, etc. so that keel blocks would not be positioned directly under them.

[Edmund]

  ah right thanks, so for when it is in dry dock fer fitting out and stuff.  hmm scrub that then.

ta,
Ed.

[Shipmate60]

The Docking Plan is the plan that is used to place the blocks and steadies for docking the ship in a drydock.
They are useful for underwater profiles of the hull and many of them extend up as far as the gunwhales.
The superstructure if shown is usually just a block diagram.

Bob

[Bunkerbarge]

A ship will either have two docking plans or it will have the two plans incorporated into the one drawing.  The main idea of the plan is to ensure that the blocks are not positioned in the same place for two consecutive dry docks thus ensuring that all areas of the hull are painted at least every alternate docking.  The plan not only shows all the hull penetrations but also exactly where the blocks should be placed by the dock prior to the ship entering it.  The plan will be forwarded to the yard to enable them to position the blocks prior to the ship entering and they will be told whether to position the blocks on plan one or plan two.

[derekwarner]

All of the responses are true.........& in this day & age we have computerised theodolites to confirm the block positioning prior to the vessel entering dock

We also have navy clearance divers underwater monitoring & reporting the vessel positioning as the water lowers

Having said this  I have seen a squashed sonar dome on an FFG when a dock block got in the way  & the vessel rested on the sonar dome  ....I am sure no one was to blame  obviously a low voltage battery in the theodolite 

Derek

[Edmund]

  Many thanks folks, yer learn summet new each day 

Ed.

[Shipmate60]

derekwarner_decoy

On all the dockings I have been on we don't use divers, (and cant due to safety concerns), and most of the yards are still using the tried and trusted measurements on the dock side.

Bob

[Bunkerbarge]

........and not wanting to be picky Derek but in almost all the dry docks I've been in, and I've done a few in my time, the water level doesn't lower, the dock rises!!!

[DickyD]

the water level doesn't lower, the dock rises!!!

That would have to be a floating dock then ?

[derekwarner]

Thank you....... DickyD....yes.......that would be a floating dock.......

1] yes the blocks are set in the graving dock...........for a vessel of 2000 tonnes to 140,000 tonnes
2] the water level lowers>>>>>the vessel rests on the dock blocks...simple physics

I have not made any reference to a 'floating' dockyard........Derek