plawolf
Lieutenant General
I don't know how sailors in any navy can practice marksmanship when the ship bobbing up and down? How the heck can one accurately "zero in" on your weapon by making adjustments on the aim sights after firing a few rounds?
The weapons should have been zeroed before the troops embark on ships. But since the shooter and the target are on the same ship, any bobbing up and down would affect both equally, so it should not affect accuracy much unless you are talking about monster waves which can shift the target a meaningful distance in the fraction of a second it takes the bullet to travel from the barrel to the target. But in those conditions, everyone would be too busy clinging on for dear life to even thing about shooting at each other.
The movement of the ship and the waves only really come into play when you are trying to shoot at a far away target on another ship. That is why they also use towed targets.
The main purpose of the kinds of target shooting as depicted in the pictures is two fold. Firstly, it is just basic marksmanship maintenance practice. Secondly, it is to get the soldiers used to shooting at targets with the sea as the background.
It's not much of an issue for boys who grey up near the sea, but for the lads from the inner provinces who are not used to it, the constantly moving waves in the background can be quite distracting, maybe even a little disorienting, especially if you mix that up with a little movement of the deck they are standing on.