I was just looking to see if J.C. Mollema had any information about Laurens Degelcamp. He served the Admiralty of Friesland. In 1652, he commanded the Gelderland (24 guns). He missed the Battle of Plymouth, as another ship collided with his, and his ship lost its bowsprit.
He was present at the Battle of the Kentish Knock. After that, we lose sight of him, until 1654, when the "Staet van Oorlogh te water voor den Jaere 1654" lists him as commanding the Omlandia (30 guns). The Omlandia was a substantial ship, but old, having been built in 1628. I believe that the only active ship that was older was the Noorderkwartier ship, the Eenhoorn, which was built in 1625. The Omlandia's dimensions were: 122ft X 26.5ft X 13ft. Her armament, in 1654, was: 2-12pdr, 3-9pdr, 6-8pdr, 6-6pdr, 9-5pdr, 2-4pdr, and 2-3pdr. It was an odd assortment of ordnance.
Laurens Degelcamp was also at the Battle of the Sound, in 1658, where he commanded the Friesland ship, the Groningen (34 guns). Here dimensions were: 132ft x 31ft x 14.5ft. Her crew consisted of 100 sailors and 15 soldiers.