The MV Estonia had fully compliant hydrostatic-release free float buoys. Please read the following carefully and stop with the persistent denial of established facts.
Estonian emergency buoys were a forgotten tuning The two emergency buoys of the car ferry Estonia did not send a signal to the rescuers because they had not been tuned on board. Emergency buoys burst to the surface properly as the ship sank. Turma's International Commission of Inquiry has investigated the activities of the emergency buoys that drifted off the Estonian coast. The buoys' batteries were fully charged, but they could not send anything untuned, says Commissioner Kari Lehtola. The committee closed the two-day meeting on Friday in Helsinki. The so-called EPIRB emergency buoys had been recently serviced and had been placed in place in accordance with the rules. However, during the installation phase, the activation of the buoys was forgotten: the protective cover must be opened and turned on the coupling head. In Estonia, the activation of the emergency buoy was one of the tasks of the radio electricians, of which there were two on board.
The investigation is still ongoing, but the Commission has consulted the radio electrician on the matter, said Asser Koivisto, the Commission's expert. The purpose of the emergency buoy is to send the location of the sunken ship and to tell the searchers the name of the ship. According to Koivisto's assessment. Helsingin Sanomat
Given the two buoys were certified as having been inspected and tested as having a signal (this means activating it for a short period) just the week before, then either (a) the ship's electrician didn't do his job properly and they were never tuned, or (b) someone deactivated them and (c) this was either via incompetence or vandalism, or given all the other factors coinciding - mid-journey time-wise and distance-wise, having just reached international waters and the explosions/collision/shudders at Swedish midnight, together with the Captain being 'taken out', as it were, or (d) deliberately planned in advance, with the aim of the vessel disappearing underwater with no-one being any the wiser for some period of time.