Chocks help to limit the motion of the engine and also dampen vibrations transmitted from engine to the tank top.
Main chocks are usually fitted beneath the longitudinal frame. Side chocks are fitted in line with the main bearings. End chocks two in number, are fitted at the aft end of the main engine.
- Cheaper installation and less skill for installing
- No dependence on correct hand fitting
- Non corrosive and corrosion resistant
- 100 % contact on uneven surfaces.