The Expedition Cruise Network (ECN) has welcomed three new members: Silversea, Seabourn and Heritage Expeditions.
The B2B membership organisation dedicated to the expedition cruise sector now has a total of 14 members.
Additionally, more than 250 travel trade professionals have signed up to the trade membership portal since its launch last month.
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The ECN aims to become a global authority on the sector by connecting expedition cruise operators and informing, educating and promoting their products to the trade.
Chairman Martin Johnson said: “It’s incredible to see the initial response of ECN both in terms of new operators joining the network and travel trade members signing up to the platform.
“The expedition cruise sector has gone through a huge amount of development in recent years and we are incredibly proud to form the first dedicated membership organisation.
“This initial response really demonstrated the opportunity for the network and the appetite of the travel industry to become more connected and informed about expedition cruising.”