The USS San Diego is an artificial reef wreck located in the Long Island Sound. Resting at depths between 20 and 35 metres, this site is suited for advanced divers with wreck certification. Access is by boat only, situated approximately 21.7 kilometres from shore. Divers should be prepared for moderate currents and variable visibility ranging from 3 to 18 metres. Water temperatures fluctuate between 5°C and 18°C, necessitating a drysuit or a 7mm wetsuit with a hooded vest. Due to the depth and potential for nitrogen narcosis, careful bottom time management and redundant lighting are essential for navigating this challenging wreck.

The Oregon is a deep wreck dive located in the Long Island Sound, resting at depths between 25 and 40 metres. This site requires boat access and is suited for intermediate divers with advanced or deep certifications. Divers encounter strong currents and visibility ranging from 10 to 30 metres. The wreck features an overhead environment, necessitating caution regarding entanglement. Water temperatures fluctuate between 6C and 18C, requiring appropriate thermal protection. The structure supports various reef fish and invertebrates that have colonised the site over time. Divers should plan for slack water to safely explore the deeper sections of the wreck, and a surface marker buoy is essential.

Obi is a shallow shore dive located in Long Island Sound, suitable for beginner divers. The site maintains a consistent depth of approximately 3 metres. Water temperatures fluctuate significantly throughout the year, ranging from 5C in February to 24C in July. As a marine environment, the habitat supports a variety of temperate marine life, including various reef fish and invertebrates typical of the region. Due to the shallow nature of the site, it is accessible for entry directly from the shore. Divers should be prepared for variable conditions typical of this coastal area.

Democrat Point is an artificial reef located in the Long Island Sound. This site is suitable for intermediate divers, with an average depth of 5 metres. Access is available via both shore and boat entries. Divers should be prepared for variable conditions, including moderate to strong currents, surge, and low visibility. Hazards at this location include cold water temperatures, which can drop to 5C, as well as potential entanglement risks and rip currents. The habitat supports a variety of temperate marine life and invertebrates typical of the region. Parking facilities are available for visitors.

Shipwreck Cove in the Long Island Sound features a combination of a shipwreck and an artificial reef structure. Located 1609 metres from shore, the site sits at depths between 7 and 13 metres, with an average depth of 10 metres. Conditions are suitable for beginners, though divers must navigate mild currents and variable visibility ranging from 2 to 15 metres. Hazards include potential entanglement in wreckage, sharp edges on structures, and active boat traffic overhead. Divers should use a surface marker buoy upon ascent. Due to water temperatures fluctuating between 5 and 20 degrees Celsius, appropriate thermal protection is required, with drysuits or thick wetsuits recommended outside of the summer months.

Smithtown Reef is an artificial reef and wreck site located in the Long Island Sound. The site sits at depths between 9 and 12 metres, with an average depth of 11 metres. It is accessible only by boat and is suitable for beginner divers. Conditions include mild currents and variable visibility ranging from 5 to 15 metres. Divers should maintain awareness of potential entanglement hazards when navigating the artificial structures and wreck elements. Typical dive times are approximately 40 minutes. Water temperatures fluctuate significantly throughout the year, ranging from 3C in February to 23C in August.

The Lizzie D, also known as the Rum Runner, is an 84-foot tugboat that sank in 1922. Resting upright in 24 to 25 metres of water, the hull remains largely intact, though the upper deck has collapsed and lies in pieces around the wreck. Located 14.5 kilometres from shore, this site requires boat access and is suited for intermediate divers due to the overhead environment and potential for entanglement. Visibility at the site varies significantly, ranging from 5 to 40 metres, with mild currents. Divers should be aware of sharp structures on the wreck. The site offers a 60-minute typical dive duration.

Cedar Beach in the Long Island Sound is a shore-entry reef site suitable for beginners. Divers can explore depths ranging from 2 to 15 metres, with an average depth of 15 metres. Conditions vary, with visibility between 2 and 15 metres and moderate currents. Water temperatures fluctuate significantly throughout the year, ranging from 3C in February to 21C in August. Typical dive times are approximately 40 minutes. The site supports a variety of temperate marine life and invertebrates typical of the region. Due to the location, divers should remain aware of boat traffic. Parking is available at the site, and guided tours are offered for those requiring assistance.