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"Madleen, named after a Palestinian fisher, is set to sail today to Gaza to help break the aid blockade imposed by the Israeli army. Stressing its peaceful intentions and nature, the Flotilla announced itself clear of any forms of weaponry.
On board, the team includes: Alana Hadid, Susan Sarandon, Daniel Machover, Abby Martin, Brian Eno, Max Porter, Aiysha Hart, Greta Thunberg, Liam Cunningham, Indya Moore, Guy Pearce, Rahma Zein, Maxine Peake, Melissa Barrera, Lisa Moorish, Nicole Jenes, Juliet Stevenson, Misan Harriman, Khalid Abdalla, Nan Goldin, Susan Abulhawa, Del Naja, and Carice Van.
The ship carries life-saving aid, including baby formula, medical supplies, and more.
You may want to edit your post because when you say 'On board' it sounds like they are on the boat.
You could list those on the boat as 'On board' and then list those supporting them separately.