Larchmont is a shallow wreck dive located in the United States, resting at depths between 5 and 6 metres. This site is defined by its challenging conditions, including strong currents and visibility that can be limited to 5 metres. Due to the active current and potential entanglement risks posed by the wreck structure, this site is suited for intermediate divers comfortable managing difficult environments. Access is strictly by boat, and divers must remain vigilant regarding heavy surface vessel traffic. Divers should consult current tables before planning a dive and must deploy a surface marker buoy prior to ascent to ensure safety in this high-traffic area.

New London Ledge Lighthouse functions as an artificial reef located in the Long Island Sound. The site features a submerged foundation at depths ranging from 1 to 9 metres. Divers can expect visibility between 5 and 10 metres. Access is strictly by boat, and the site is suitable for beginners. Water temperatures fluctuate significantly, ranging from 5C in winter to 22C in summer, necessitating appropriate thermal protection. Moderate to strong currents are common, so divers should remain close to the structure. Guided tours are available and recommended to navigate the foundation safely and manage current conditions effectively.

Ocean Beach is a shore-entry snorkel site located in the Long Island Sound. The site features a reef area accessible directly from the beach. Water temperatures fluctuate significantly throughout the year, ranging from 5C in the winter months to 22C during the summer. Snorkellers should be aware of the physical hazards present at this location, including a surf and shore break at the entry point. Strong currents and rip currents are also common, requiring careful monitoring of local conditions before entering the water. Facilities available on site include parking, toilets, and a cafe for post-snorkel refreshments.

Montauk Jettys in Long Island Sound provide a shallow shore dive ranging from 1 to 7 metres in depth. The jetty structure functions as an artificial reef, offering hard substrate for local marine life to colonise. Divers can expect mild currents and visibility between 3 and 6 metres. Due to the potential for surf, surge, and boat traffic, divers should exercise caution during entry and exit and use a surface marker buoy. This site is suitable for beginners and supports night diving. Parking is available on-site, though conditions vary, and divers should assess the shore break before entering the water.

Mashapaug Pond is a 300-acre freshwater lake located within Bigelow Hollow State Park in Union, Connecticut. Set inside the Nipmuk Forest, the site features rock formations and provides shore access for divers. Depths range from 4 to 12 metres, with an average depth of 5 metres. Conditions include mild currents and visibility between 2 and 10 metres. Water temperatures fluctuate significantly, ranging from 4.4°C at depth to 21°C at the surface during summer months. Divers should be aware of potential hazards including boat traffic, cold water, entanglement risks, and low visibility. Facilities available at the park include parking, toilets, showers, changing rooms, and a rinse station.

U-853 is a German Type IXC/40 submarine that rests upright on a sandy bottom at depths between 30 and 40 metres. Located 11 kilometres offshore, this wreck is largely intact and offers penetration opportunities for qualified divers. The site is subject to moderate currents and visibility ranging from 3 to 15 metres. Water temperatures fluctuate between 6 and 17 degrees Celsius, making a drysuit essential. Due to the significant depth, potential for nitrogen narcosis, and overhead environment, this site is strictly for advanced divers with wreck and deep certifications. Divers should monitor gas supplies and bottom time closely while navigating the structure.

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Rocky Point in the Long Island Sound features a combination of natural and artificial reef structures. Divers can explore this site at depths ranging from 5 to 18 metres. Access is available via both shore and boat entries. Conditions include mild currents, though divers should be prepared for surge and swell upon entry. Visibility typically ranges between 5 and 15 metres but can shift rapidly during a dive. Water temperatures fluctuate significantly throughout the year, ranging from 4C to 18C, necessitating appropriate thermal protection for the season. The site is suited for intermediate divers, with typical dive times around 40 minutes.