The Task was based on designing and building a bridge across an estuary. Part of roadway had to be raised using a control device that had to be part of The design. When raised, the clearance had to be sufficient to allow the passage of a "tall ship" (HMS "Rotary" taking essential supplies to a disaster area). This portion had to be lowered. The bridge had to strong enough to allow a vehicle (1kg in weight) to be dragged across both before and after raising. The clearance of the un-raised bridge had to be such that barges could pass underneath at all times.

The Foundation task required just one spar to be raised.

The Intermediate task required two to be raised but a central support was available "mid-stream".

The Advanced task also required both spars to be raised but no central support was available.