"A substantial cache of arms"

So, I'm reading this article about the Indian Navy capturing some of the recently troublesome pirates we've been hearing about. The article goes on to say:

"Indian marine commandoes boarded the pirate boats and seized 'a substantial cache of arms and equipment,' including seven AK-47 assault rifles, three machine guns, a rocket-propelled grenade launcher and other weapons, the statement said. They also found a GPS receiver and other equipment."

First, I'm pretty sure I know people who have more substantial weapons, and second, "a gps receiver"?! Wow. I can't imagine what qualifies as "other equipment" if a gps receiver is listed by name. Toiletries and tooth picks perhaps?