 The name Little Jason Lagoon was approved in order to indicate the nature of the feature, and at the same time to conform with local usage.The narrow peninsula separating the lagoon from the harbour ends in Lagoon Point, first called Bluff Point by DI but renamed on a 1930 British Admiralty chart.On the same narrow peninsula as Lagoon Point sits The Split Pin, a twin pinnacle rock formation high, also charted by DI.