It runs on a station called E4
Corporal. Note: An E3 in the Marine Corps is called a lance corporal; a rank which to the best of my knowledge only exists in the British Army and the US Marines. A lance corporal is the highest enlisted rank, and a corporal is the lowest non-commissioned officer rank.
The Marines are Marines. The Army has Army Special Forces AKA Green Berets.
11 on e4 or 12 on e4+1
NO, they are called 'submariners' .
There isn't a specific rank attributed to it. Generally, a tank gunner would be Private (E1) through Specialist (E4). Field Artillery would be more the same. There is a Gunnery Sargeant in the Marines.
"Jarhead" and "Gyrine" are less than favorite nicknames for marines.
TBS and or My TV 20 and E4 and e4+1
Double king pawn openings (1. e4-e5) also called open games Double queen pawn openings (1. d4-d5) also called closed games Semi-open games (1. e4-any Black move other than e5) Indian opening (1. any White move other than e4 or d4)
MARSOC MARine Special Operations Capable
Becoming an E4 is not based on your ASVAB score. If you are talking about enlisting as an E4, you must have a Bachelor's degree. You can also become an E4 by enlisting and doing a good job and putting your time in.
You most likely will keep the same rank. You might be able to get a promotion if the MOS you are going into needs people but the person that would have the best answer would probably be a recruiter or someone in your admin. might know.