Hull Outfittings
Hybrid Vortex Reducing Fin
A hull appendage that breaks up hull-generated wake vortices ahead of the propeller to recover propulsive efficiency.
Hull Outfittings
Apu Block
A rudder trunk bearing block that supports the rudder stock and permits it to rotate under load.
Overview
The apu block, more commonly called the rudder carrier or rudder trunk bearing, is the bearing assembly that supports the weight of the rudder stock inside the rudder trunk while letting it rotate freely as the helm is put over. It carries continuous load whenever the vessel is underway, so its bearing surface and seal are wear items inspected at every drydocking. Excess clearance here shows up as play in the rudder that steering gear then has to work against.
Specifications on request
Full specifications, material grades and dimensions are confirmed per enquiry. Tell us the vessel and the duty, and we will send the datasheet.
View datasheet—
Related equipment
Other equipment filed under the same part of the catalogue.
Hull Outfittings
Rudder Blade
The flat, streamlined surface that deflects water flow to steer a vessel, mounted on the rudder stock.
Hull Outfittings
Rudder Horn
A fixed hull structure that carries the lower rudder bearing on a semi-spade or horn-type rudder arrangement.
Hull Outfittings
Rudder Pintle
The pin that locates and bears a rudder in its gudgeon, forming the hinge the rudder swings on.