Dublin Port Tug Boats Shackleton & Beaufort dance on the river liffey in Dublin Ireland.
The two tractor tugs, Shackleton and Beaufort, are 24 metres long and with a 50 tonne bollard pull are 50% more powerful than the two vessels they replaced.
Built at the Astilleros Zamakona shipyard in Bilbao, Spain, the tugs have a distinctly Irish feel with their green and white colouring and being named after two remarkable Irish explorers, Ernest Shackleton and Sir Francis Beaufort.
