OB on a cruise ship stateroom usually means Oceanview , and on some cruise lines it can specifically mean an obstructed oceanview category where the window view is partially blocked.

What it means

  • Oceanview : a cabin with a window or picture window facing outside the ship.
  • Obstructed view : the view may be blocked by lifeboats, ship structures, or equipment near the window.
  • On some ships, OB is a booking code used to distinguish a specific oceanview category, often with a particular deck or location.

Practical tip

If you see OB in a stateroom listing, check the full cabin description before booking, because the exact meaning can vary a bit by cruise line.

TL;DR

OB usually means Oceanview, often with an obstructed or limited view.