Edith Breaker sits south-west of Big Seal Rock near Treachery Head and holds a grim distinction in local maritime history: this is the reef that the 5,272-ton steamship SS Satara struck at quarter past midnight on 20 August 1910, holing the vessel fatally and sending her to the bottom in twenty minutes accompanied by a large explosion, though remarkably only two of the 89 people aboard were lost. As a submerged, largely unmarked hazard close to the main shipping route past Sugarloaf Point, the breaker has claimed other vessels too over the decades, and it is dived today both as a reef in its own right and as a piece of maritime history — a reminder of just how dangerous this stretch of coast was to shipping before modern navigation aids. As a dive site, Edith Breaker offers rocky reef structure in a depth range of roughly 10 to 30 metres, with gutters and gullies typical of the broader Seal Rocks reef system, and divers exploring its shallower margins may encounter scattered wreckage or debris associated with its history as a ship-breaker rather than expecting to find the main Satara wreck itself, which lies deeper and further away near Treachery Head.

The site's genuine current exposure and depth range mean it suits experienced divers, and it is usually offered by Forster Dive Centre as a variation for repeat Seal Rocks visitors or those with a specific interest in the area's shipwreck history, rather than as the default site for a first Seal Rocks trip.

Boats for the Seal Rocks sites either run the longer distance down from Forster/Tuncurry (about 45-60 minutes) or launch locally from the small boat ramp at Seal Rocks village itself, near Sugarloaf Point, cutting the run to Big and Little Seal Rock down to 10-20 minutes. Seal Rocks is a small, remote settlement reached via Lakes Way/Mungo Brush Road through Myall Lakes National Park; there is no dedicated dive shop in the village itself, so most Seal Rocks charter diving is booked through Forster Dive Centre, with divers sometimes meeting the boat locally rather than travelling from Forster.

Seal Rocks sits on an exposed headland with Sugarloaf Point taking the full force of easterly and south-easterly swell — trips are cancelled in anything beyond about 1.5 m swell, and the site is often diveable when more sheltered locations further north are blown out, or vice versa, so conditions should always be checked specifically for Seal Rocks rather than assumed from Forster. Visibility is typically 15-30 m and can be excellent in settled autumn and winter weather; it drops after the Myall Lakes and Wallis Lake systems discharge following heavy rain. Grey nurse sharks are present at almost any time of year here, with numbers varying seasonally, and the wrecks (Satara, Catterthun) require calm, low-current conditions for safe deep/technical diving.

Descend onto the breaker's reef structure and work its gutters and gullies at 10-30 m, being aware this is the same reef that claimed the SS Satara — watch for scattered wreckage or debris fields at the shallower margins in addition to the natural reef life.

Forster Dive Centre (Tuncurry) — regular boat trips to Seal Rocks, year-round, weather permitting.