Stay well - Stay safe- Stay armed - Yorktown
USA = "HOO-ah"
SEALs = HOO yah
The real difference is that in the USMC and USA the calls are mainly sincere calls of gung ho-ness yelled at full cry by true believers.
In the SEALs (after BUD/S training), "hooya" is spoken many way for every situation.
/1/ Pretty girl walks by: "hooooooyaaaaaah" said low and melodically like a wolf whistle.
/2/ A great deal just came up: "HOO F---ING YA!!"
/3/Like "Okay": "hooya" real quick at a talking voice.
/4/ We are getting screwed again by our officers: "HOOO ya" in a borderline overtly sarcastic way.Etc.
SEALs HATE to be seen as "gung ho" and cultivate a jaded "been there done that" blase attitude. You shuffle out the back of a C-130 on a jump like a bored commuter getting off a bus. You never polish your boots until you have been ordered 20 times, and then you do the minimum. As soon as that officer leaves, you put your prized ancient no polish "suede look" jungle boots back on. You keep your faded old jungle cammies at the bottom of a seabag to get them sufficiently soft and wrinkled. The only sharp part of your look that is critical is the Oakley shades. "Personal" headgear and sidearms are de rigeur. Hair must be touching the ears. If you are not warned about the length of your hair and mustache every week at least, you are not trying. As an E-5 you believe that you are worth any five Commanders in the fleet.
You do NOT yell "HOO YA!!!!" in a big group with sincere feelings like the USMC and USA. Never.