The Outer Bommies sit deeper and further out than their Inner counterpart, dropping into the 26-32 m range where the character of the diving shifts from the shallow bommie field's dense schooling-fish soup to what local divers describe as more traditional deep-reef diving. The structures here are generally larger and more solid, with less of the scattered, patchy feel of the shallower field, and the deeper water brings a different mix of species, favouring larger resident fish and occasional pelagic visitors over the sheer numbers game of the Inner Bommies.Because of the depth, this is very much an Advanced-diver site requiring genuine deep-diving experience and tight gas and no-decompression management; bottom times are correspondingly short, and a shot line or careful anchoring is standard given the depth and potential current. The Outer Bommies are typically dived as the second, deeper leg of a two-dive trip out of Norah Head or Terrigal Haven, following a shallower warm-up on the Inner Bommies, a sequencing that also makes sound decompression sense given the depth progression.

Visibility tends to be better out here than in the shallower, more turbid inshore bommie field, particularly once the East Australian Current or a settled autumn weather pattern has cleaned up the water column, making this one of the better deep-reef options on the Central Coast for divers with the training and experience to make the most of it. A dependable shot line and a plan for a drifting or fixed safety-stop position pay off here, since the depth leaves little margin for improvising a hang if the anchor drags or a diver becomes separated from the group.

Reached by boat from Norah Head or Terrigal Haven alongside the shallower Inner Bommies; typically the second, deeper dive of a two-dive bommie trip.

These offshore sites need a settled weather window with under about 1.5 m swell and light winds, launched from either the rough Norah Head beach ramp or from Terrigal Haven depending on which operator is running. Visibility is generally best in autumn and early winter once the summer's plankton blooms have cleared and before the coldest, greenest winter water sets in, though the East Australian Current can bring clear, warm water south at almost any time of year. A recent blow or heavy rain (Hunter and Tuggerah Lakes runoff) reduces visibility for several days.

Descend directly to the bommie tops around 26 m, explore the more solid reef structure and deeper ledges for larger resident fish and pelagics passing over, keeping bottom time conservative given the depth, and ascend well before gas or no-decompression limits are tight.

Terrigal Underwater Group (TUG) club boat and members' private boats dive these sites regularly; no standing recreational charter runs to the deeper Norah Head wrecks, which are mostly visited by technical-minded club divers on calm-weather trips.