hardtack
pilot biscuit
pilot bread
sea biscuit
ship biscuit

During the wait they were provided with extra ammunition, cold salt pork, and hard sea biscuits.

Great numbers of heart-shaped brown sea biscuits had appeared.

The men on board were exhausted and burned by the sun, surviving off raisins, salt pork and sea biscuits, their supply of water running low.

Munching on a sea biscuit they provided, but not ravenously, he answered their questions.

After the hard sea biscuit, this tasted perfectly delicious, and Peter, not knowing what strange adventures lay ahead, ate every scrap.

Some species within the order, not quite as flat, are known as sea biscuits.

The sailor grinned and passed him a fragment of sea biscuit.

Their main food was dried peas or beans, sea biscuit and salt pork.

I've had a sea biscuit and a spoonful of salmon in the last two days.

In the old days, it was crumbled sea biscuits.