This is a modified Navy DCU from the Naval Special Clearance Team-One. This is a specialized unit comprised of SEALs, Navy EOD, Marine Recon, and SWCC qualified personnel. According to one article I found, this group is tasked to "conduct low-visible underwater mine and obstacle reconnaissance and clearance operations from over the horizon to to the seaward edge of the surf zone".
Interestingly enough, NSCT-1 is also responsible for training and overseeing of dolphins specefically trained to detect underwater mines.
There isn't a tremendous amount of information out there about this unit, but I have provided links to several articles about them. Hoping to find out a little more about the unit.
Link: http://www.minwara.org/Meetings/2005_05/Proceedings/23-NSCT%20ONE%20MINWARA%2005%20Brief.pdf
Link: http://www.smithsonianmag.com/science-nature/Uncle_Sams_Dolphins.html
Link: http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA498163
Interestingly enough, NSCT-1 is also responsible for training and overseeing of dolphins specefically trained to detect underwater mines.
There isn't a tremendous amount of information out there about this unit, but I have provided links to several articles about them. Hoping to find out a little more about the unit.
Link: http://www.minwara.org/Meetings/2005_05/Proceedings/23-NSCT%20ONE%20MINWARA%2005%20Brief.pdf
Link: http://www.smithsonianmag.com/science-nature/Uncle_Sams_Dolphins.html
Link: http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA498163