Merchant Marine?

I know it’s one of the 5 service academies. What do they train marines?

Plus, why do some sites say it has a low acceptance rate, while others say it has a 100% acceptance rate. If you go there, do you have to commit to serving (I’m willing to commit). Do you also need a senate letter?

also, it says you get admission results in fall of senior year, so do you apply in junior year?

I believe they’re just like the other service academies, low acceptance rate and have to get a letter from VP, Pres, Governor, etc.