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APT is expanding its expedition fleet, with the acquisition of a third vessel.

MS Sea Explorer will join MS Island Sky and MS Caledonian Sky in October.

The ship was purchased from the Renaissance Cruises fleet. As were her two sister-ships.

During her first two years with the line, MS Sea Explorer will sail on existing charter cruises.

In early 2016 she will undergo refurbishment to compliment Island Sky and Caledonian Sky. She will then sail in Scotland and Norway for APT.

Carrying only 150-passengers, APT chief executive Chris Hall said her intimate size allows her to sail “off the beaten track” cruise itineraries.

Like her sister vessels, she will also be equipped with inflatable Zodiacs to offer trips to remote places.

“Many of our guests who travel on our luxury small ship product have already sailed on one of our river cruises,” Mr Hall said.

“They are attracted to this different cruise style because they’ve already created an affinity with the intimacy of travelling with an average of 150 people, and our ‘all-suite’ ships hit the right note with these guests who love the comfort and relaxed atmosphere but want to try a cruise aboard a private yacht-like expedition ship.”