Duikcentrum Onderwaterwereldwww.onderwaterwereld.com Instructor Training Center Koningstraat 40, 2011 TD, Haarlem, Netherlands ProgramsEcologyEmergency TrainingLifeguardRebreatherScubaSnorkel DiverSwimExtended Range (XR)ServicesBuoyancy CompensatorsDive ComputerDry SuitNeoprene suitsRegulatorCylindersOffersBoat DivesShore DivesExtended Range DivesSnorkel ToursGas FillsAirEquipmentDive ComputerEquipmentPhoto and Video DiveLanguages Nederlands / Dutch English / English Payment MethodDebit Card Affiliate with Center +31235367189 Contact Back Duikcentrum Onderwaterwereldwww.onderwaterwereld.com Instructor Training Center Koningstraat 40, 2011 TD, Haarlem +31235367189 Email www Opening Hours Mondaynot openedTuesdaynot openedWednesday09:00 - 18:00Thursday09:00 - 18:00Friday09:00 - 18:00Saturday10:00 - 17:00Sunday17:00 - 21:00Woensdag, Donderdag en Vrijdag: - van 09 tot 14 uur op afspraak. - van 14-18 uur vrije inloop. Zondagavond zwembad Groenendaal op afspraak Email www Upcoming Events Powered by Courses Beginner Courses Advanced Dive Trips Snorkeling Course The SSI Snorkel Diver program is your first step towards discovering a passion for the underwater world. It is the best way to learn how to snorkel and develop your confidence in the water, so you can go snorkeling and explore the mesmerizing landscapes and wildlife of the aquatic world. You do not need to be a proficient swimmer to participate in the Snorkel Diver program, and there is no minimum age to join. You just need to be comfortable in the water, able to maintain your buoyancy, and ready to begin the adventure of a lifetime! In this program, you will be introduced to the equipment and skills you need to go snorkeling safely. Begin your snorkeling training and earn your SSI Snorkel Diver recognition card today! October 18, 2026 $67.45 €60.00 Scuba Skills Update It is easy for dive skills to get rusty and to lose confidence when you have not dived for a while. With the SSI Scuba Skills Update, we will get you back in the water and diving with ease in no time. This scuba refresher course allows you to review and practice scuba skills you learned in your Open Water Diver program, under the guidance of an SSI Professional. This is a great course to take just before a dive holiday, so you spend less time worrying about your skills and more time admiring the marine life. If you are a non-certified Open Water Diver student, a Scuba Skills Update is ideal for practicing your dive skills before your open water training dives. With no fixed course duration, you can take your time and focus on the skills you need help with. October 18, 2026 $146.15 €130.00 Scuba Skills Update It is easy for dive skills to get rusty and to lose confidence when you have not dived for a while. With the SSI Scuba Skills Update, we will get you back in the water and diving with ease in no time. This scuba refresher course allows you to review and practice scuba skills you learned in your Open Water Diver program, under the guidance of an SSI Professional. This is a great course to take just before a dive holiday, so you spend less time worrying about your skills and more time admiring the marine life. If you are a non-certified Open Water Diver student, a Scuba Skills Update is ideal for practicing your dive skills before your open water training dives. With no fixed course duration, you can take your time and focus on the skills you need help with. October 25, 2026 +27 More $146.15 €130.00 Try Scuba The SSI Try Scuba program is the best way to try scuba diving for the first time. You will be in confined water and well looked after by your instructor, so you can enjoy those first unforgettable breaths underwater and experience the magic of scuba diving. At the end of this short course, you will have earned your SSI Try Scuba recognition card and undoubtedly want to go diving again. Endless scuba diving adventures are waiting for you and this course is where it all begins. Start today! October 25, 2026 +14 More $56.21 €50.00 Scuba Skills Update It is easy for dive skills to get rusty and to lose confidence when you have not dived for a while. With the SSI Scuba Skills Update, we will get you back in the water and diving with ease in no time. This scuba refresher course allows you to review and practice scuba skills you learned in your Open Water Diver program, under the guidance of an SSI Professional. This is a great course to take just before a dive holiday, so you spend less time worrying about your skills and more time admiring the marine life. If you are a non-certified Open Water Diver student, a Scuba Skills Update is ideal for practicing your dive skills before your open water training dives. With no fixed course duration, you can take your time and focus on the skills you need help with. November 1, 2026 +7 More $146.15 €130.00 Snorkeling Course The SSI Snorkel Diver program is your first step towards discovering a passion for the underwater world. It is the best way to learn how to snorkel and develop your confidence in the water, so you can go snorkeling and explore the mesmerizing landscapes and wildlife of the aquatic world. You do not need to be a proficient swimmer to participate in the Snorkel Diver program, and there is no minimum age to join. You just need to be comfortable in the water, able to maintain your buoyancy, and ready to begin the adventure of a lifetime! In this program, you will be introduced to the equipment and skills you need to go snorkeling safely. Begin your snorkeling training and earn your SSI Snorkel Diver recognition card today! November 1, 2026 +11 More $67.45 €60.00 Open Water Diver I want to learn to dive! My dream come true We hear from many divers who have started dive training, "I should have done this years ago." Once started, it doesn't let you go. The underwater life, the floating underwater, the technique of diving, the atmosphere with divers. Pure relaxation. Good training is half the battle. November 15, 2026 +9 More On Request Perfect Buoyancy The SSI Perfect Buoyancy Specialty is the best way to improve buoyancy and get the most out of every dive. Buoyancy is an essential diving skill but any diver will tell you it takes time to perfect. With the Perfect Buoyancy specialty, you will learn advanced skills and techniques so you can master your buoyancy faster and enjoy more relaxed diving adventures. In this fascinating program, you'll also learn new skills that protect the environment and work in any situation. Upon completion, you will earn the SSI Perfect Buoyancy Specialty certification. With improved buoyancy, you'll soon be able to float even easier, take the underwater photos you dream about and explore the ocean effortlessly. October 18, 2026 $168.63 €150.00 Extended Range Foundations The SSI Extended Range Foundations program provides you with an opportunity to enhance your advanced diving skills in a workshop environment. Learn more about using tec diving gear with any total diving system you are certified to use and build upon your basic skill set to master buoyancy, trim, finning techniques, positioning, and communication. The Extended Range Foundations program provides supplementary training to existing certifications to increase your confidence and in-water control. All in-water sessions are completed in a pool/confined water environment at depths less than 12 meters. You will earn the SSI Extended Range Foundations certification after completing this program. October 18, 2026 +1 More On Request We are going to Marsa Nakari - Egypt 1 week in period 9-21 November 2026 For our Active Divers and Instructors. A great experience for all diving levels. Send us an email if you have interest or questions. We'll see how we can make it happen. November 9, 2026 On Request Dive4Life Germany Kings Dives at D4L, for our Active Divers and Instructors It is a tradition. On King's Day we go diving in Dive4Life. A whole day. This year it is on the old Queen's Day April 30. Let us know if you are interested or considering it. That will put you on the mailing list for further information. April 27, 2027 On Request Frequently Serviced Dive Sites Powered by Duikschool de Grevelingen, 4322 NB Scharendijke Kerkweg, Den Osse (★3.9) Dive site Kerkweg in Den Osse is one of the most famous dive sites in Zeeland. Here you can dive from the jetty on oyster beds, an artificial reef of reefballs and many other hard substrate that is nicely overgrown. The maximum depth is about 30 metres, but you will find most life in the shallow water. One2Dive, 4907 ZK Oosterhout Zeelandbrug (★3.9) Zeeland Bridge can be called the most popular dive site on the Eastern Scheldt. Especially in the sepia season (May-June) this site is very popular among divers from the Netherlands, Belgium, France and Germany. Scuba World Arnhem, 6811 CG Arnhem Zoetersbout (★3.6) Zoetersbout is an accessible dive site in the Oosterschelde, there is virtually no current here, but it can be felt at the head of the dike. You dive along an overgrown dike wall with eels, lobsters and galatheak lobsters as permanent residents. Dive between the weeds and discover the underwater life here. Scuba World Arnhem, 6811 CG Arnhem Bergse Diepsluis (★3.7) The Bergse Diepsluis, also known as Oesterdam or the Thoolse Gat by local divers, is a very accessible site and enables divers to get acquainted with the wonders of the Oosterschelde National Park. This site has little to no current due to its location, making it an ideal spot for beginners. Dutch Scuba Divers, 2282 GX Rijswijk Zandeiland 4 (★4.0) Zandeiland 4 is one of the most beautiful and diverse lakes to dive in the Netherlands. There are objects in the dive zone and greater depths for more technical dives. The facilities are good and parking is close to the water. TODI, The Ultimate Experience (★4.3) TODI, The Ultimate Diving Experience, is a gigantic indoor diving pool 10 meters deep and 36 meters in diameter, with more than 6,200,000 liters of water and a consistent temperature of 23°. One2Dive, 4907 ZK Oosterhout Dreischor Frans Kokrif (★3.9) Just before Dreischor Gemaal is another dive site. This is enhanced by the artificial reef that was built here a few years ago. Just like at Scharendijke and Den Osse, a ribbon of reef balls have been laid here. Parking is easy and via a staircase, over the dike, you come to a riser where you can go to the water. Duikcentrum The Wave, 2181 AK Hillegom Toolenburgerplas (★3.4) A nice dive site with an easy to follow dive path and many underwater objects, such as wrecks, cars, two training platforms and even an old cannon! Visibility varies throughout the year but is generally good. Course progress can only be saved when you are logged in! Register / Log In Continue Without Login