seelonce feenee
n.— «At approximately 18.15, the Rescue Coordination Centre of New Zealand requested that the Esperanza “stand down.” We informed the Rescue Centre that we would remain within VHF range in case assistance was needed. At 20:15 we received what’s known as a “Seelonce Feenee,” which means that the distress call is now over.» —“Sea Shepherd Ship Holed during Collision with Whaling Ship” by Takver Indybay (San Francisco, California) Feb. 12, 2007. (source: Double-Tongued Dictionary)
Oh! It’s French: silence fini. Correct response to a distress call is for everybody not involved in the emergency to get off the frequency, hence _silence_. When the emergency is over, the caller or responder announces “silence finished.”