Wouter Loos was a soldier on board the Dutch East India Company ship Batavia, which sank on Morning Reef in the Wallabi Group of the Houtman Abrolhos Islands off the coast of Western Australia in 1629.
In the course of the mutiny he was accused of being involved in a particularly gruesome and notorious incident in which all the Predikant (minister) Gijsbert Bastiaenszoon's family, apart from his eldest daughter Judith, were massacred in their tent.
Other mutineers nearby immediately prepared to attack, so the defenders killed all their prisoners on the spot, apart from Corneliszoon, and Loos, who managed to escape.
[4] Forewarned by Wiebbe Hayes, leader of the defenders, that the mutineers intended to capture the Sardam, Pelsaert acted decisively and the mutiny was ended.
[5] However, on 27 October Pelsaert reopened Loos' investigation, the result of the Predikant's daughter Judith raising his complicity in the massacre of her family.
Upon his guilt being determined, the ship's council then made an unusual decision: instead of hanging Loos, he would be marooned on the coast, along with Jan Pelgrom de Bye van Bemel.
Subsequently, on 16 November 1629, Loos and de Bye were abandoned on the Western Australian coast, probably at the mouth of the Hutt River,[6] with a small boat, trade goods and 'provided with everything.