What's lookout about at sea?

Traditionally, the duties of a lookout include maintaining situational awareness and providing warning of the risk of collision, stranding and other dangers to navigation. Therefore, in addition to the use of both eyesight and hearing, the effective use of available instruments and equipment are essential to the purpose of proper lookout; this applies particularly to radar. The aim of this paper is to emphasise the need for the correct practice and method of lookout.