The Gothenburg disaster of 24 February 1875 is one of Australia's worst maritime losses. The iron-hulled screw steamer, built in 1854 at Millwall and rebuilt in 1873 to about 60 m (196 ft), was heading south from Darwin (then Palmerston) to Adelaide carrying passengers – including Northern Territory officials, a judge and returning miners – and some 3,000 ounces of gold. Steaming inside the reef in a severe storm, she struck Old Reef, north-west of Holbourne Island, and was pounded by the seas.

Between 98 and 112 people died (most accounts cite 102); only 22 survived, and all women and children aboard were lost. The gold was salvaged by a hard-hat diver within weeks. The wreck faded from memory until 1967, when Home Hill spearfisherman Peter Rubiolo and friends struck metal while diving on the reef – the rediscovery was the subject of an ABC feature in 2026.

Today the site is protected under Commonwealth underwater cultural heritage legislation, with a 200 m permit zone, and is listed on the Queensland Heritage Register. What remains lies in 9–16 m. The timber is long gone, but the iron structure is recognisable: two large boilers, deck beams, the oscillating steam engines, iron tanks, a donkey boiler and a winch, surrounded by a coral garden.

The Marine Life Network lists soft and hard corals, anemones with clownfish, coral trout, cod, sea perch, pelagic fish and sharks around the site, with visibility up to 20 m. For divers with an interest in maritime history, it is a significant wreck and a sobering one. The depth is modest and conditions usually benign, but access requires planning and a permit, and no operator runs it routinely.

Divers must not touch or remove anything.

Boat only, by authorised charter holding a permit for the protected zone. Old Reef lies roughly 130 km south-east of Townsville on the inner shelf; the closest launch points are Alva Beach/Ayr and Bowen harbour, from which a fast vessel needs 1.5–2.5 hours depending on conditions. Private divers must obtain a permit from the Commonwealth (Australasian Underwater Cultural Heritage Database / Queensland heritage officers) before entering the 200 m protected zone, and must not anchor on the wreck.

There is no regular public trip; enquire with Townsville/Ayr charter operators.

Old Reef is an inner-shelf reef exposed to the south-east trades, which blow strongly from April to September; a calm window of under 15 knots is needed for a comfortable trip and to hold position over the wreck. Wet-season floods from the Burdekin River (January–April) can reduce visibility markedly; the clearest water (up to 20 m) comes in settled spring weather. Tidal currents across the reef flat are moderate and strongest on springs – plan for slack water.

Marine stinger season (box jellyfish and Irukandji) runs roughly November to May – wear a full-length stinger suit or wetsuit with hood and gloves, carry vinegar. Cyclone season November–April; tropical lows and cyclones can close sites and damage coral (TC Yasi 2011, TC Debbie 2017).

Descend on a shot placed on sand beside the wreck (not on the remains), locate the two large boilers as a reference, then tour the deck beams, oscillating engines, iron tanks, donkey boiler and winch at 9–16 m before finishing in the adjoining coral garden.

Protected historic shipwreck – look but do not touch; no penetration.

No scheduled operator. Authorised charters only (permit required); occasionally visited by Townsville/Ayr charter boats and club expeditions with permits. Nearest dive centres for gear hire, fills and local advice: Yongala Dive (Alva Beach), Adrenalin Snorkel & Dive (charter).