6.1.1 The ACV is
to have an intact buoyancy reserve of at least 100 per cent at the
maximum operational weight.
6.1.2 The hull
is generally subdivided by longitudinal girders and transverse primary
members. Individual spaces formed by these intersecting members and
which are required to contribute to buoyancy are to be designed as
watertight structures. For structural design purposes the load head
in metres is to be measured vertically, as follows:
- Plating – the distance from a point one third of the height
of the plate above its lower edge to the top skin.
- Stiffening – the distance from the mid-span of stiffener
to the top skin.
6.1.3 Tests are
to be carried out to check the tightness and integrity of individual
buoyancy spaces. Testing requirements are to be agreed with the attending
Surveyor.
6.1.4 Access to
the buoyancy spaces is to be provided for inspection to the satisfaction
of the attending Surveyor.