I was doing the CAT04 taking off from Santa Maria.
My takeoff clearance came with something like this
"Clear for takeoff, runaway 30, right crosswind departure 1350 at 5"
I did ask to repeat the last bit because i initially though it would be wind. but it was clearly 4 digits.
Is it actually altitude to maintain within a 5nm distance from the airport ? would match a pattern alt
I didnt ask for more clarification to the controller...

Thanks !