Dave Hartley

Dave Hartley is the first officer on ORCA. He is always friendly towards the kids and he teaches Winston how to swim and dive when he is in danger of being dismissed because he cannot swim. Mr. Hartley always stays calm and composed, even in risky situations. During the third season he trains the cadets, during the forth he only has a few appearances.

Brett thinks Dave would be quite suitable as a new husband for Dianne, and so he once writes a faked anonymous love-letter to his mother. But the plan fails, as the letter gets in the hands of Sally-Anne who thinks Jason sent it.