There are (5) opening ports on the outboard sides of each hull. The daggerboard is made from solid carbon fiber. The daggerboard trunks have a crash box where the 5X has sacrificial daggerboards. Notice the cabin length and glare protection of both boats. The boom on the HH 55 collects the sail. A roller fuller boom is also possible.

Note the tall vertical carbon fiber stanchions with triple safety lines on the HH 55.