Palestine solidarity activists have announced the largest aid flotilla yet is preparing to sail to Gaza this spring.

"With our governments fueling genocide and failing to uphold their legal and moral obligations, the people of global civil society are rising together in larger and larger numbers," the Freedom Flotilla Coalition Steering Committee said in a statement.

"This flotilla is collective action on a massive global scale – uniting activists, legal experts, parliamentarians, medical professionals, engineers, artists, journalists, and other people of conscience across the world."

The upcoming voyage brings together the Global Sumud Flotilla, Global Freedom and Sumud Flotilla, Thousand Madleens to Gaza, and the Freedom Flotilla Coalition.

The groups are joining forces with the aim of breaking Israel's brutal siege of Gaza.

Since 2010, the Freedom Flotilla Coalition has attempted to deliver life-saving aid to the Palestinian people while drawing attention to governments' and world leaders' complicity in Israel's atrocities.

So far, Israel has prevented each of the boats from reaching Gaza's shores.

After the last flotilla mission, the coalition condemned the alleged rape and sexual assault of international volunteers by Israeli police and prison officials and called for an independent investigation.