Dry dock

A dry dock is a basin which one drains for the construction and the repair of the boats. The first forms were simply dug but because of the low resistance, the concreted model arrived.

At the subgrade one finds one or of the line (S) of chocks allowing the boat not to be posed directly on the concreted bottom when water is withdrawn.

Closing of the form

In order to put dry the form, it was advisable to drain it. The first forms were blocked by a traditional door but in 1683, the intendant Pierre Arnoul developed with Rochefort the technique of the dry-dock caisson.

Like shows it the photograph, the technique consisted in closing the form using a boat. With high tide, the dry-dock caisson floats on the river, one introduces the boat with radouber into the form then one comes to place the dry-dock caisson across the form, in guides. Once the dry-dock caisson installed, one runs it using a system of ballast and one can thus begin work with dryness after having drained the form.

Naval construction

In naval construction, one can distinguish two types of forms:

forms of construction
the shapes of armament

Forms of construction

A form of construction is a form in which the boats will be built. It is equipped with average of very important lifting, being able to raise very strong loads.

The shapes of armament

A form of armament has as a utility to allow an rapid access with a boat in completion. It thus lays out the weak ones means of lifting.

List of form

Form Joubert

See too

Cale dries
Radoub

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