Backboard

A few minutes later I came to and I was on a backboard with a neckbrace on being taken down the mountain by ski patrol.

The basketball player dunked the ball so hard that the backboard shattered.

The washstand had a small mirror attached to its backboard.

The L.B.S.C.R. favoured backboards for signals wherever these helped visibility. The Great Eastern also made extensive use of backboards.

And to delight in the fact that a hole on the backboard side means that you're safe because you're sitting on the starboard side seems to me to be less than clever.

But the gangplank was no longer in place. It had folded itself in half and clamped into storage position, becoming part of the starboard rail. Big Tom peered over the rail and saw nothing but sea. All around. Starboard, backboard, forward, aft.