We were on the Rocio del Mar in March 2018. It holds about 18 divers with 10 crew members IIRC. Diving is well organized and orchestrated. We were divided into three groups and geared up about 15 minutes apart. They have two zodiac style pangas so the first one is back to the boat by the time the third group is ready to dive. Boarding is handled very well, particularly in the rougher seas at Roca Partida. The panga captains are always watching for SMB's as divers are allowed to dive according to their computers and gas consumption....you come up when you need to.
Food is great and nicely varied. Early continental breakfast followed later by a hot breakfast, lunch, afternoon snack and dinner. Cabins are comfortable but not huge, of course. Crew cleans and tidies your cabin every day.
The boat has a lower deck which houses the galley, crew quarters and dining area. Most cabins are on the main deck as well as the diving gear up and camera area. Middle deck has a couple more cabins, a smaller outdoor seating area and an indoor lounge. Upper deck is mostly open for lounging with a bar and barbecue area that was used to serve two of our
dinners.
We had a great crew. All were very friendly, attentive, good at their respective jobs and hard working. I can definitely recommend the Rocio del Mar.