3.1.1 For
the purpose of classification, an Engineering System is defined as
any system that may be installed in a ship where such a system comprises
one or more sub-systems or components. For the purpose of determining
the appropriate assessment process for engineering systems in naval
ships, there are three categories:
-
Mobility.
-
Ship Type.
-
Ancillary.
3.1.2 Mobility
category engineering systems are those systems installed in order
for the ship to proceed on operations and are necessary for:
-
Maintaining the watertight and weathertight integrity of the hull and
spaces within the hull.
-
The safety and reliability of propulsion, steering and electrical
systems.
- The operation and functioning of emergency machinery and equipment.
3.1.3 Ship
Type category engineering systems are those systems installed in order
for the ship to carry out its in-service purpose and are necessary
for:
-
The operation and functioning of the systems and equipment installed
for purposes relating to the ship’s in-service purpose excluding the operation and
functioning of military systems.
-
The operation
and functioning of emergency machinery and equipment.
3.1.4 Ancillary
category engineering systems are all systems other than Mobility category
or Ship Type category, failure of which may compromise the provisions
of Classification and are necessary for:
- The provision of basic conditions on board for the carriage of
stores, fuels, equipment and personnel when the ship is at sea, at
anchor, or moored in harbour.
3.1.5 Engineering Systems are to be assigned to the appropriate category taking into
consideration the:
- ConOps for the vessel (see
Vol 1, Pt 1, Ch 2, 2.2 Definitions 2.2.17);
- criteria in paragraphs Vol 2, Pt 1, Ch 1, 3.1 Categories 3.1.1 to Vol 2, Pt 1, Ch 1, 3.1 Categories 3.1.4 for Engineering Systems and the Mobility, Ship Type and
Ancillary categories;
- dependency of Mobility or Ship Type engineering system upon other
systems or services for their correct operation (e.g. if the propulsion plant’s
electronic control systems is cooled by chilled water, then the chilled water
system is to be considered critical to the propulsion plant’s function and
assigned to the Mobility category);
- military systems and damage control arrangements relating to the Ship Type are to
be stated where applicable.
3.1.6 Services
such as the following are considered necessary for minimum comfortable
conditions of habitability:
- cooking;
- heating and cooling;
- domestic refrigeration;
- mechanical ventilation;
- sanitary and fresh water.