Contest Entry Name: Kobukson
It's a Korean turtle-shaped battle ship from around 15-16th century.
Canon fires from all sides and snipers inside the head & tail. Closed thorned steel top prevents enemies aboarding.
Kobukson/Turtle Ship by toms781, on Flickr
My godness captain. These are one the most generous prizes I've seen on ECF contests.
You should let the contest run for some more days for maximum exposure~!