During an exercise the Minehead inshore lifeboat D-712 <i>Christine</i> prepares to pick up to 'men overboard'. The crew member in the bow is indicating the direction with a raised arm so that the helm at the back of the boat knows which way to steer.
<a href="//commons.wikimedia.org/wiki/User:Geof_Sheppard" title="User:Geof Sheppard">Geof Sheppard</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>