There is not a lot about Marlinspike. Here is what I have:
From RTC website:
Basic Seamanship Phase
"I wish to have no connection with any ship that does not sail fast; for I intend to go in harm's way." -- John Paul Jones
One of the most physically challenging and motivating events in your training calendar is Basic Seamanship. You will start with the basics of line handling and shipboard watch standing. Don't relax, your training will move quickly. By the end of the third day you will be tested on getting the USS MARLINESPIKE (simulated training ship) underway and back to port safely as a team. Successful completion of this vigorous training will put you one step closer to the final hurdle "Battle Stations."
Are you Sea Worthy?
Also and older Boot Camp video with a brief portion (They have new ones and that is the one I post...but I like the old ones too...maybe I'll post both from now on).
Start at min 7:13 - 7:58
(Photos courtesy NavyDEP.com and Craig)