(Updated September 2023.) The National Maritime Museum is home to the retired destroyer HMAS Vampire, the retired submarine HMAS Onslow, a replica of Captain Cook's ship HMB Endeavour, the former Japanese fishing vessel and later Australian Special Forces vessel Krait, and a number of other vessels as well as nautical paraphernalia from the years.
As you can see, the Opera House isn't the only building whose shape has been inspired by sails. This one was designed by Philip Cox, Richardson Taylor & Partners in the late 80's to early 90's. The roof's shape evokes the image of billowing sails, in case you missed it... which admittedly would be rather difficult.
The corrugated metal roof stands over 25 metres (82 ft) tall on the west side, but drops significantly on the east meaning that it slopes down toward the water.
Cox has been known for designing a lot of Australian (and some international) civic buildings in his (as of 2023) 83 years of life, including some that WERE around Darling Harbour. That was until, a few years after this shot was taken, some genius came up with the idea of blowing up perfectly serviceable buildings like the Convention Centre and Exhibition Centre to "ree-vy-ta-lyze" the area. (Which I find is often a code for "Make lots and lots of money out of unnecessary government work".) His most recent project was 2 years ago, and at this point I'm not sure whether he will or even wants to do any more. Much as I like my work (at times), if I had the wherewithal I think there are other things that I would want to be doing at that age.