A ship is a big target, release bombs from above AAA range. Weapons delivery profiles are found in this manual, pick one with a release point above 3k feet. http://www.avialogs.com/en/aircraft/usa/northrop/f-5tigerii/to-1f-5e-34-1-1-f-5e-f-tiger-ii-aircrew-nonnuclear-weapons-delivery-manual-to-1f-5e.html