The waterway forks just beyond Entry Island. Breaksea Sound travels northeast past Harbour Islands (on the right) and extends for 19 miles into the Vancouver Arm and the Broughton Arm. Its total coverage of 19 square miles qualifies Breaksea Sound as the third largest of the 14 fjords in Fiordland. Instead of exploring this area, your ship will travel south through the Acheron Passage.