Home page||Ship employment
Modern cargo ships structural plans- how to use them
Structural plans, sometimes called scantlings plans, show dimensions of the ships framing and plating. The midships section drawing, generally available for all ships, and the shell expansion plan are particularly useful. The midships section drawing provides
the data required for the midships section modulus calculation.
The shell expansion plan and larger scale shell plating drawings show details
of the hull plating such as the size, thickness, and material of the plating. They also show details of openings, fittings, and appendages attached
to the plating. Much of the data needed for designing patches and structural repairs, and for determining the feasibility of making hull cuts can
be obtained from shell drawings.
Docking Plans and Reports
In addition to docking information, the ship docking plan shows the underwater profile of the ship, the
plan view of its bottom, and locations of underwater appendages, sea suctions, and overboard discharges, with reference points and measurements
to locate them. The docking plan also provides vertical measurements from the main deck and base line, the location and dimensions of the docking
blocks for the three docking positions, and the critical dimensions of the ship.
Docking reports provide a complete and accurate description of the ship’s bottom. They describe the results of inspections and work done while
the ship is in dry dock. Reports for emergent or unplanned dockings do not provide a complete bottom description, but address only the work
done during the docking; reports of unplanned drydockings can be considered supplements to the report of the previous regular dry docking. Docking
reports are further supplemented by subsequent underwater hull inspection, hull cleaning, and repair or work reports. In addition to an overall
description of the ship’s bottom, docking reports include two items of interest to salvors: the shaft covering, if any, and the type of paint applied
to the ship’s bottom and appendages. Information on paint systems and coverings alerts the diving supervisor to potential toxic hazards.
Fig:General cargo ships midship cross section
Other useful articles :
Role of Classification Societies in maintaining cargo ships standard seagoing condition
- Assigning loadlines marks
Loadlines are marks punched into and painted on the sides of general cargo ships.The assigning of the vessels loadline and the issue of the Certificate is the
responsibility of the Marine Authority of the country. .
Cargo ships Loaded Condition
closely monitor the ship's condition during cargo
operations to ensure that if a significant deviation from the agreed loading/unloading
plan is detected all cargo and ballast operations must STOP..
Packing a container recommended method
Packing a container should always be done on level plane either on the ground,on a railcar, or on a trailer. In the case of a trailer, care should be taken to ensure the trailer cannot tip whilst being packed especially if a forklift truck is being used. If necessary the trailer should be propped. Brakes should be securely applied and wheels choked.
- Packing principles relating to cargo in containers
Where relevant, stowing should be carried out in a sequence which will permit
rapid checking and storage operations during and after unloading. Should the
consignment include cargo subject to customs pre-entry procedures, customs
examination would be made easier and unloading avoided if the cargo were
stowed at the end of the container by the door.
- Container Securing guidance
Containers have very little strength in any direction other than vertically
through the corner posts thus it is necessary to provide substantial support
to the containers when they are on the ship. Stowage of containers is with
their longer dimension fore and aft since the ship motion transmitted to
cargo is greater in rolling than pitching and it is therefore prudent to limit
any possible cargo movement within the container to the shorter transverse
- Trim and stability booklet for cargo ships
Contain either curves of form or hydrostatic tables and stability and trim characteristics for various conditions of loading
- Broken stowage? Cargo ships guideline
The access shall be separate from the hatchway opening, and shall be by a stairway if possible. A fixed ladder, or a line of fixed rungs, shall have no point where they fill a reverse slope
Ship type, design and facilities for cargo
Cargo gear is designed for speed and flexibility for handling breakbulk, palletized, or container cargo. Various combinations of derricks,
winches, and deck cranes are used for the handling of cargo. Cranes are fitted on many vessels to reduce manpower requirements. Some ships
have special heavy-lift derricks that may serve one or more holds. Booms are rigged for either yard and stay (burton) or swinging-boom
- Cargo ships structural plans- how to use them
Structural plans, sometimes called scantlings plans, show dimensions of the ships framing and plating. The midships section drawing, generally available for all ships
Machinery system main info pages
Home page||Cooling ||Machinery||Services ||Valves ||Pumps ||Auxiliary Power ||Propeller shaft ||Steering gears ||Ship stabilizers||Refrigeration||Air conditioning ||Deck machinery||Fire protection||Ship employment
General Cargo Ship.com provide information on cargo ships various machinery systems -handling procedures, on board safety measures and some basic knowledge of cargo ships that might be useful for people working on board and those who working in the terminal. For any remarks please
Copyright © 2010-2016 General Cargo Ship.com All rights reserved.
Terms and conditions of use