Continuity mistake: The SEAL Team attempts to take the island in the cover of night. When Hummel expects invaders, he sends out patrols to look for them. In every shot of the patrol searches it is night. Except for one shot where it is pure daylight.
Continuity mistake: When Goodspeed is driving through the warehouse in his yellow convertible then smashes through the big glass window you'll notice that it's simply not possible. The window is about a foot off the ground, which means there would have to be a ramp. If you look closely there are two hinges at the bottom of the window which show where the ramp ends. The fact that there's a ramp at a dead-end window was poorly planted there by the crew.
Chosen answer: He wasn't meant to be involved in any action, but being SAS-trained he could defend himself if needed. He was given the equipment just in case.