Page 202 - Introduction to Marine Engineering

Deck machinery and hull equipment 18'

Cover
section

Operating
controls
Hatch
coaming

Roller

Figure 10.5 Weather-deck hatch cover

Electrical supply

Figure 10.6 Tween-deck hatch cover

operating cylinder for the pair of covers. Control is from a nearby point
and hydraulic piping is reduced to a minimum.
Maintenance requirements for this equipment are usually minimal but
regular inspection and servicing should be undertaken. Most hatch
covers can, if necessary, be removed manually.

Stabilising systems

There are two basic stabilising systems used on ships—the fin and the
tank. A stabilising system is fitted to a ship in order to reduce the rolling