Iran is Israel's archenemy and supports Gaza's militant Hamas rulers. Dispatching a ship to Gaza risks a high-seas confrontation with the Israelis.
Israeli commandos killed nine pro-Palestinian activists on May 31 when they intercepted a blockade-busting flotilla bound for Gaza organized in part by a Turkish group.
The Tuesday television report quotes a spokesman for the ship, Abdolraouf Adibzadeh, saying the vessel begins its 14-day journey Sunday. The ship, called "Infants of Gaza" will carry 10 passengers, including five local journalists, besides the crew.