The Escort Missions Suck

I’ve just started playing the game recently and I’ve gotten to the German Invasion of Denmark and the missions that happen with it are terrible.

Maybe I’m playing them wrong but it’s a nightmare because you can’t get to close or else they’ll get mad at you and if you get to far it’ll take so long to get back to them that the ships are already sunk.

Is there any tips for these missions? I’ve figured out that I should make save files in case I fail (so I don’t have to go back) but that’s about it. Plus the ships that are attacking are almost never in good position for torpedo’s and I can’t do much else since I’m in the smaller U-Boat (without an 88)