They aren't really considered sea kayaks. They are suited for short distances for people who don't get much exercise or who aren t really interested in learning traditional kayaking techniques. No serious kayaker even considers Ocean Kayaks brand when purchasing a personal boat. They are sold mainly to resorts, which they are perfectly suited for, and people who don't really want to learn to kayak properly. With a traditional decked kayak , the paddler is an intimate part of the boat.
Modern kayaks have very comfortable seats.
To customize the seat and to gain more control, many paddlers attach hip pads to the sides of the seat. This is still not as secure as a rigid deck to brace against. One of the most important kayak techniques is bracing . Bracing is a maneuver used to prevent capsizing. A strong brace is one of the hallmarks of a good paddler.