By Hadas Kuznits

PHILADELPHIA (CBS) — The second “Olympia Tattoo Convention” is underway.   And what makes this event unique is that it takes place on a boat.

“This is a tattoo convention on a floating battleship from 1890,” says organizer Troy Timple (in photo).

The convention takes place aboard the historic USS Olympia, berthed at Penn’s Landing, through Sunday.

“We have tattooers set up throughout the boat,” Timple says.  “We also have a collection of acetate stencils so you can come and get an authentic acetate stencil in the same manner that it was done in 1950 (but) probably a little bit more sterile than then.”

Admission to the convention is $20.  And if you don’t want to get tattooed, the convention’s partnership with the Independence Seaport Museum provides for other activities as well.

“We have a bunch of old flash — museum pieces,” Timple says.  “The museum also has the retro painting show, which has some historical tattoo artifacts in it as well.  The same price gets you into the museum, the boat (Olympia), and the painting show.”