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These three ice-strengthened vessels are 330 tons, travel at less than 11 knots (20 km/h; 13 mph); are crewed by a complement of 14; and are armed by 12.7-millimetre (0.50 in) automatic weapons. Normally two vessels will be on station, while the third would be on its way to, returning from, or being serviced in its homeport, back in Denmark.