Northern Diver | Premier Manufacturer of Drysuits & Diving Equipment Over 45 Years of Elite Scuba Diving Equipment. We offer a fantastic range of scuba diving & water sports products. From our famous made-to-measure drysuits to Coltri Compressors, we have everything yo Northern Diver International Ltd specialises in all things diving across the recreational, commercial, rescue and military sectors. For over four decades, our reputation as one of the world’s leading drysuit and scuba diving equipment manufacturers has gone from strength to strength, with a genuine love of diving at our heart.