Container vessels Capacity and Stability

Using GetxoNaval program

In my post of October 12, 2012 I enclosed a reference to an aproximate calculation of capacity of container vessels that now I have included in a larger program, called GetxoNaval, made-up of a set of calculations relating to main aspects to be considered during the preliminary design of a merchant ship, i.e. the dimensioning stage. But the revised module corresponding to container vessels is far more complete than the one displayed in said blog post. It now includes stability calculation, static and dynamic, with corresponding curves.

Clicking on next link you will enter in GetxoNaval program, that at this moment includes following modules:

GETXONAVAL

1. Tonnage
2. Cruising ships
3. Stability cargo ship
4. Stability deck barge
5. Stability container carrier
6. Hull forms (coefficients)
7. Freeboard
8. Maneouverability
9. Lightship weight
10. Predimensioning
11. Powering
12. Cargo & tanks capacities
13. Help

Additional modules are expected to be added and all will be subject to continuous revision.

Launching of ship “EDT Hercules” 

in La Naval from Sestao (Spain)

Ship type PSV for shipowner EDT from Cyprus

On  23th  July “La Naval” from  Sestao performed the launching of the ship “EDT Hercules” for the Cyprian group EDT  and her delivery will be made in the next spring, although previously she will be preceded by the one of her twin ship, presently  in the fitting-out quay.

The launching was normal although with the rare arrangement of being launched by the bow, due to the forms of the ship that are very fine at  the stern which would make it difficult her launching by this end as  is normally made.

Dimensioning a merchant ship

 With the program GetxoNaval

GetxoNaval program  objective is to  allow making  quick, approximate calculations necessary to define the dimensions of a merchant ship. This program can be used basically in two different ways:

• To make an estimation of the main ship dimensions based on  its size, defined, for example, by deadweight, number of containers, volume  of cargo spaces etc.
• To make a calculation of different particulars (deadweight, speed etc.) of a ship whose  main dimensions are known, either  because they have been defined in the previous point, or for being a known ship but one or several of her capacities are unknown.

Clicking  following link you can access to the program GetxoNaval  hosted  in Google-Sites.

GetxoNaval

Preliminary dimensioning

Cargo ships

In my post of April 9, 2010, I presented a form to get a preliminary dimensioning of cargo ships once the user defined her type and a goal particular, deadweight, cargo volume or containers number, depending on the selected type. I have revised the form to be used and I present now its second edition.

To use this procedure click on following 

                                                   "CALCULATE"

Training Sail Vessels of Bilbao River

Speech from Juan José Alonso Verástegui

On last 6th March the Dr. Naval Architect D. Juan José Alonso Verástegui issued a presentation of subject theme in the "Maritime Museum Ría de Bilbao", within the acts to celebrate its 10th anniversary.

A full account of his presentation, together with my comments,  is to be found in my blog "Oteando desde Getxo", and a copy of his most important documents can be found hereafter.

Stability of deck barges and pontoons

In a previous post I included an approximate procedure to estimate the stability of cargo ships in the preliminary design stage, but a blog reader pointed out to me that it was not good enough for the special case of   deck barges and pontoons , which are artefacts carrying all load above the deck. Due to this so special condition these floaters (they are not conventional ships) have received a different stability consideration in the IMO  regulations and I have been preparing a specific procedure for estimation of their stability.

In the form that opens by clicking the following link, GetxoNaval ship dimensioning program is open and selecting the deck barges stability tag, the user is requested to input a few data of the barge / pontoon and he gets a suitable information about its stability in the specified loading condition. After the form a user guide is shown and a results interpretation.

Begin calculation