Fort Stark offers a shore-entry dive featuring a combination of reef and wall topography. The site is suitable for beginners, with depths ranging from 5 to 8 metres and an average depth of 7 metres. Divers navigate through areas of rockweed and kelp-covered boulders. Conditions include mild currents and visibility typically between 5 and 9 metres. Water temperatures fluctuate significantly throughout the year, ranging from 4C in February to 17C in late summer. Divers should remain aware of potential hazards, including boat traffic, entanglement risks, surf, and periods of low visibility. Parking is available at the site.

Duck Island is a shallow reef site located five miles off the coast of New Hampshire within the Isles of Shoals. This marine site is suitable for intermediate divers and requires boat access due to its distance from the shore. The average depth is three metres, with conditions characterised by moderate currents and cold water temperatures ranging from 4C to 19C throughout the year. Divers should be aware of potential hazards including boat traffic, strong currents, and surf. Typical dives at this location last approximately 60 minutes.

The Cut is a drift dive site located between Duck Island and Shag Rock in the United States. This reef site requires boat access and is situated approximately 24 kilometres from shore. Divers should be prepared for strong currents, surge, and low visibility, which typically ranges between 1 and 6 metres. The site reaches depths of 15 to 30 metres and is suited for intermediate divers. Species recorded around this area include gray seals, harbor seals, rock crabs, common lobsters, wrasses, righteye flounders, common sea stars, shrimp, pipefish, cod, snails, and European green crabs. Typical dives last 45 minutes in water temperatures ranging from 5C to 17C.

Mingo Rock is a reef and drop-off site located off the Isle of Shoals. The topography features a wall that descends from 2 to 18 metres, with an average depth of 10 metres. Visibility at the site ranges from 10 to 30 metres, allowing divers to observe the drop-off from the shallower sections. Access is strictly by boat, as the site is located over 8 kilometres from shore. Conditions include moderate currents and potential surge, requiring careful monitoring of surface conditions before entry. Due to water temperatures ranging from 4 to 16 degrees Celsius, a drysuit or thick wetsuit is recommended for most of the year.

Isles of Shoals is a reef site located off Cape Ann, United States, offering a significant depth range from 3 to 65 metres with an average of 40 metres. This site is strictly for intermediate divers due to challenging conditions, including strong currents, surge, and swell. Visibility is variable, typically ranging between 3 and 10 metres. Access is by boat only, and divers must remain vigilant regarding boat traffic. Given the cold water temperatures of 4 to 11 degrees Celsius, thermal protection such as a drysuit is necessary. Dives are typically 50 minutes long, though conditions require conservative planning and careful monitoring of current and tide states.

Cedar Island Ledge is a reef site located off Cape Ann, accessible only by boat. The reef structure ranges from 12 to 18 metres in depth, with an average depth of 15 metres. Divers encounter mild currents, though surge and swell conditions vary and require attention. Visibility typically fluctuates between 5 and 15 metres. Water temperatures are cold, ranging from 5C to 16C, necessitating appropriate thermal protection. Species recorded around this area include Gray Seals, Harbor Seals, Common Lobsters, various crabs, and wrasses. Due to boat traffic in the vicinity of the Isle of Shoals, divers should deploy a surface marker buoy before ascending.