OLNA - North Sea Coast
The OLNA wreck, sitting upright in a modest seven metres of water, offers a surprisingly engaging dive for its depth. We’ve found the shallow profile makes for long bottom times and great natural light penetration, illuminating the steamship’s structure. You can easily navigate the bow and stern sections, which are now completely colonised by crabs and flatfish. It's a fantastic spot for newer wreck divers looking to get their fins wet on a genuinely historical site, or for anyone keen on a relaxed dive with easy access.
- Location
- North Sea Coast, Denmark, Mediterranean & Europe
- Coordinates
- 55.320557, 11.083333
- Type
- wreck
- Maximum Depth
- 7m
Marine Protected Area: Sprogø og Halsskov Rev
Best Time to Dive in North Sea Coast
The warmest water temperatures in North Sea Coast occur in January, averaging 4.6°C. The coolest conditions are in December at 4.6°C.
Monthly Water Temperatures
- January: 4.6°C (air: 3.3°C)
- February: 4.6°C (air: 3.6°C)
- March: 4.6°C (air: 4.1°C)
- April: 4.6°C (air: 6.7°C)
- May: 4.6°C (air: 11.2°C)
- June: 4.6°C (air: 15.4°C)
- July: 4.6°C (air: 16.2°C)
- August: 4.6°C (air: 16.7°C)
- September: 4.6°C (air: 14.7°C)
- October: 4.6°C (air: 10.8°C)
- November: 4.6°C (air: 6.9°C)
- December: 4.6°C (air: 3.3°C)
Nearby Dive Sites in North Sea Coast
- 101 (POSSIBLY) - 20m (wreck)
- Aalborg Sportsdykkerklub
- AAROSUND - 10m (wreck)
- ACTIV - 14m (wreck)
- ADAMAR - 24m (wreck)
- AGNES - 0m (wreck)
- AGNETE - 5m (wreck)
- AGNETHE - 12m (wreck)
- Albertus (reef)
- ALBIS - 2m (wreck)
- ALEX - 15m (wreck)
- Alholm Rev (reef)
- ALLIANCE - 10m (wreck)
- ALLIANCE H 156 - 22m (wreck)
- ALMA - 20m (wreck)
Nearest Dive Centres to OLNA
- Aquatic Marine
- Blivdykker.dk - ["PADI"]
- Broagerlands Dykkercenter
- Carlsens Dykkercenter A/S - SSI
- Dieter's Tauchshop
- Diving 2000 A/S - ["PADI"]
Marine Life in North Sea Coast
Home to 105 recorded species including 55 reef fish, 9 crabs & lobsters, 8 other, 7 clams & mussels, 6 sea snails & nudibranchs, 5 seagrass & algae.
Notable Species
- dab (Limanda limanda) - Reef Fish
- Protestant (Clupea harengus) - Reef Fish
- Atlantic cod (Gadus morhua) - Reef Fish
- whiting (Merlangius merlangus) - Reef Fish
- Ocean quahog (Arctica islandica) - Clams & Mussels
- Fluke (Platichthys flesus) - Reef Fish
- Blue mussel (Mytilus edulis) - Clams & Mussels
- sprat (Sprattus sprattus) - Reef Fish
- Common cockle (Cerastoderma edule) - Clams & Mussels
- bull rout (Myoxocephalus scorpius) - Reef Fish
- Sea potato (Echinocardium cordatum) - Sea Urchins
- Sand mason (Lanice conchilega) - Worms
- eel (Anguilla anguilla) - Reef Fish
- Edible periwinkle (Littorina littorea) - Sea Snails & Nudibranchs
- Common sea star (Asterias rubens) - Starfish
- long rough dab (Hippoglossoides platessoides) - Reef Fish
- Pollock (Trachurus trachurus) - Reef Fish
- Common shore crab (Carcinus maenas) - Crabs & Lobsters
- New Zealand Mudsnail (Potamopyrgus antipodarum) - Sea Snails & Nudibranchs
- Common dragonet (Callionymus lyra) - Reef Fish
Recommended Packing List for OLNA
Based on average water temperature of 4.6°C.
- Drysuit - water at 5°C demands a drysuit with thermal undergarments
- Hood & Gloves (7mm+) - critical to prevent heat loss
- Mask - essential for every dive
- Fins
- BCD - buoyancy compensator
- Regulator - your most safety-critical piece of gear
- Dive Computer - tracks depth, time, and NDL
- Surface Marker Buoy (SMB) - essential for boat pickups
- Dive Torch - useful for crevices and colour at depth
- Underwater Camera - capture your diving memories