What's the difference between amidships and midships?

Amidships

Definition:

• (adv.) In the middle of a ship, with regard to her length, and sometimes also her breadth.

Example Sentences:

Midships

Definition:

• (adv.) In the middle of a ship; -- properly amidships.
• (n. pl.) The timbers at the broadest part of the vessel.

Example Sentences: