Sounds like you've done a lot of pace work in practice to know how it should feel and raced 800m already so you know how that feels too.
I have raced only one 1500 SCM, and never specifically trained for it as I was concentrating on my 400, and like PP suggested and 'cos I was way more experienced in a 400, I split the race into 4 parts. That way once I got to 1100m with 400 to go, I could speed up or steady off on the pace as I was back in my comfort zone. So if your distance is the 800, make that last 800 feel like your normal 800 swim.
Good luck!
Sounds like you've done a lot of pace work in practice to know how it should feel and raced 800m already so you know how that feels too.
I have raced only one 1500 SCM, and never specifically trained for it as I was concentrating on my 400, and like PP suggested and 'cos I was way more experienced in a 400, I split the race into 4 parts. That way once I got to 1100m with 400 to go, I could speed up or steady off on the pace as I was back in my comfort zone. So if your distance is the 800, make that last 800 feel like your normal 800 swim.
Good luck!