Talked with an older gent this weekend who had been a Skipper of an LSM in the Pacific during the war. He correctly guessed that I could not describe an LSM. Landing ship, medium. Odd-looking craft.
We built over 500 of them. Designed for island-hopping, smaller and quicker than LSTs, carrying just 3-4 tanks and crews. He said he did a lot of ferrying, and they were too small potatoes for kamikazes or subs to bother with. He said they put plenty of 40 mm in the air, but thinks that they never hit anything.
For landing, they threw out a stern anchor, then headed for the beach. As the tanks off-loaded, you could maybe float off. When you loaded tanks on, you needed the stern anchor winch and hoped for the best. You were not supposed to get stuck.