ND31 (Oder) is a shipwreck located in Trondheim, Norway, that sank on 23 August 1943. This site is strictly for technical divers due to its significant depth. Access to the wreck is by boat only. Conditions at the site are generally characterised by mild currents, though the depth remains a primary hazard for all visitors. The surrounding habitat supports a variety of temperate marine life, including various reef fish and invertebrates typical of the Trondheimsfjord region. Divers should be prepared for deep-water diving protocols when exploring this historical vessel.

Trolla is a shore-entry reef and wall site in Trondheim, Norway, featuring a structure that descends from 5 to 50 metres. The site is characterised by a dense kelp forest in the shallower sections, transitioning into a deeper wall that provides a clear reference for depth management. Divers should expect cold water temperatures between 4 and 15°C and variable visibility ranging from 5 to 30 metres. Currents are typically moderate but can strengthen, making it essential to plan dives around slack water. Hazards include cold water, low visibility, sea urchins, and strong currents. Night diving is permitted at this location, which typically requires an intermediate skill level.

Plaugen is a technical dive site in Trondheimsfjord, Norway, featuring the wreck of a 58-foot catamaran barge that operated between 1886 and 1975. The wreck lies at depths starting around 38 metres and extending deeper. The site also includes reef and kelp forest topography. Divers typically spend 45 minutes on a dive here. Conditions are variable, with visibility ranging from 5 to 15 metres and mild currents. Access is via a shore entry. Due to the depth and the nature of the wreck, this site presents hazards including entanglement and overhead environments, making it suitable for intermediate divers with appropriate technical training.

Høvringen is a shallow dive site located in Trondheim, Norway, within the Trondheimsfjord. The site features a depth range of approximately 3 to 7 metres, making it suitable for shallow-water exploration. The underwater environment is characteristic of the region, supporting a variety of temperate marine life and invertebrates typical of the fjord habitat. Divers should be prepared for variable conditions common to this coastal area. Access is generally straightforward given the shallow nature of the site, which is well-suited for those looking for relaxed, shallow dives. Records for this location date back to 2013, reflecting its established use by the local diving community.

MidtDykk is an artificial reef located in Trondheim, Norway, within the Trondheimsfjord. This site offers a unique underwater environment structured to support local marine ecosystems. Divers can explore the artificial structures which provide habitat for a variety of temperate marine life, including diverse reef fish and invertebrates typical of the region. Conditions in the fjord can vary, and divers should be prepared for temperate water environments. Access to the site is supported by available parking facilities nearby. It is suitable for divers interested in observing the development of artificial reef habitats and the associated marine biodiversity within this fjord system.

Havsport in Trondheimsfjord offers a combination of reef structures and dense kelp forests. The site spans depths from 8 to 40 metres, with an average depth of 20 metres, making it suitable for intermediate divers. Visibility varies between 5 and 20 metres, and moderate currents are present, which can strengthen depending on tidal states. Boat access is required to reach this site located 1000 metres from shore. Due to consistently cold water temperatures, drysuit diving is necessary. Night diving is permitted, and local facilities provide air fills, equipment rental, and guided tours to assist with navigating the site conditions.

Korsvika in Trondheim offers a diverse underwater environment featuring both natural reef and artificial reef structures. This shore-entry site is suitable for beginners, with depths ranging from 1 to 19 metres and mild currents. Visibility at the site varies between 5 and 30 metres, allowing for clear observation of the varied topography. Divers should exercise caution near the artificial structures and rocky reef edges, as these surfaces can be sharp. On-site facilities include parking, toilets, and a cafe, providing convenient access for divers. Sturdy boots are recommended for the shore entry over the rocky terrain.

Lektern is a shore-entry reef site located in Trondheim, Norway. This site features shallow, calm water, providing a forgiving environment suitable for beginners or those building confidence in open water. As a temperate reef habitat, the site supports a variety of marine life typical of the region, including various reef fish and invertebrates. Divers should note that conditions are variable; visibility and currents can change noticeably depending on weather and tidal movement. Facilities are not confirmed on-site, so divers should arrange air fills and equipment hire before travelling. Always check local conditions on the day of your dive.