Extended Horizons operates Maui’s friendliest, most experienced, and caring Maui scuba diving shop. Our Maui dive group sizes are small (maximum 4:1 ration of divers to guides). We have nationally credentialed and highly rated Maui naturalists/diving guides that know more, see more, and will show you more. We are consistently ranked the top scuba dive charter with the best Maui dive tours in the Lahaina area.


37 years diving in Maui!

Small groups up to 6 divers

Safety, Fun, Education, Conservation

Guides are Instructors & Certified Naturalists.
Boat captains are divers too.

100% Bio-diesel boat,
Dive Shop Run on Solar Power
Maui Mooring Sponsorships & Installations
Reef Clean-ups & Recycling


Extended Horizons was the first, and remains the only boat in Lahaina to run on 100% Biodiesel, sourced and made locally from recycled cooking oils. We’ve been running without fossil fuels since 2006! We are one of only five businesses in the State to receive Platinum recognition and be awarded the coveted Hawaii Clean Fleets award for our green initiatives. Our use of Biodiesel reduces our carbon footprint by 83% compared to Petro diesel.



• Small Group Sizes
• Longer Bottom Times
• AL80 Tanks Standard
• Computer Profiles on our Boat Dive

Meet The Lanai & Maui Scuba Crew




Erik is the owner operator of Extended Horizons, which he started in 1983 with two sets of dive gear and a lot of youthful energy! He is a US Coast Guard 100 ton Captain, PADI Instructor, SDI Instructor, regulator repair tech, Visual Cylinder Inspector, Certified Interpretive Guide, as well as our trailer repair tech, sometimes head mechanic and all-around maintenance and fix-it guy! If you’re lucky enough to dive with Erik, hold on to your hat! He is probably the most passionate, animated dive guide on our staff!




Victoria began her diving in 1986 in Nashville, TN, and has been with Extended Horizons since 1998, when she came out on a Lana‘i charter as an Open Water Diver and decided not to go home! She is Director of Operations, our lead Captain with a US Coast Guard 100 ton license, PADI Instructor, SDI Instructor, a Certified Interpretive Guide, as well as a Published Professional Underwater Photographer. Victoria is also a certified professional for Equine Assisted Psychotherapy (in her former life she was a horse trainer, but now she trains people instead!). Victoria developed the training program for our guides and captains; she does a lot of the organization projects around the shop, usually is our Costco runner, and she’s handy with a toolbox for our various projects around the shop! Of all of those skills, her passion as a dive guide is probably her greatest strength!




Hollis is originally from upstate New York, and had a passion for the ocean from a young age.  She decided she wanted to be a marine biologist by the time she was 8 years old, and when the time came she pursued that degree at the College of Charleston.  Her first ever dive was on the Great Barrier Reef in 2011 and she was back 7 years later working as a diver!  Since then she’s made her way here to Hawaii, first diving on Oahu, and for the past 5 years here on Maui.  She loves blowing bubbles, making fish friends and sharing stories about Maui’s marine world with our guests!




Howdy Ya’ll! Shelby is from Texas and began her dive career as Junior Open Water Diver in 2009. Driven by her curiosity into the underwater world, Shelby earned a Degree in Environmental Science, and soon after graduation moved to Honduras to pursue her Instructor Certification and begin her professional Scuba Diving career. She has participated in Coral Restoration Projects and Eco Programs, and began teaching at Extended Horizons in June, where she loves sharing and obtaining knowledge of the Worlds Oceans.




Emma is originally from Los Angeles but has always thought of Maui as her second home. Her mom was born on island and Emma visited her family frequently growing up. She always loved wildlife and decided to pursue a degree in Animal Science and Biology. During her studies, she worked with marine mammals and interned at the Maui Ocean Center where she learned about Hawaiian sea creatures. She earned her Divemaster in Australia and her Instructor certification on Maui. Emma is an enthusiastic, yet calm diver that loves to talk about anything conservation or animal behavior related. Surprising fact: Emma’s first dive was right here on Maui at Kahekili Beach as a teenager.




Growing up in the Philadelphia area, Bruce was fascinated by ocean creatures, particularly sharks and whales.  He got his open water diving certification in 2015 in Monterey CA and has since been lucky enough to dive some great locations in the world including Indonesia, French Polynesia, and the Caribbean. After many years of working in the tech industry in San Francisco, Bruce was ready to do his PADI instructor training in the Florida Keys in the summer of 2021, and then move to Maui to pursue his dream of teaching scuba and getting to dive Maui’s great dive sites every day.  Bruce likes to geek out watching any nature documentaries like Planet Earth or Secrets of the Whales that come out!




Rachel grew up in Pennsylvania where the two mouths of the Susquehanna Rivers meet. She has loved being in and on the water since she was born, fascinated by the underwater world. In college, she was torn between her love of the ocean and its creatures, and her love of human interaction. She ended up with a major in Anthropology and a Biology minor. Rachel was lucky enough to have her first dive experience on the Great Barrier Reef in Australia and has taken every opportunity to dive since. In 2019 she decided to make things official, and became certified in Greece, going from Open Water to Assistant Instructor in six months! Rachel completed her PADI Instructor Course on the island of Maui and enjoys working with all of the people drawn here.




As a child Philip was fascinated with scuba, and he took his first opportunity to dive in New South Wales, Australia, which ignited his passion and love for the world’s oceans. Then and there he decided he would become a scuba instructor, and upon returning to Idaho, Philip completed his PADI Divemaster training. Philip is a Boise State University graduate and he loves to share local culture and history. He lives by the motto “if you pick up treasure, you must also pick up trash.” He loves volunteering his time with Project Aware Dive Against Debris. His dive experience ranges from Australia, cold dark lakes of Boise Idaho, Key West Florida, Cozumel, Pacific NW glacial altitude dives, and now beautiful Hawaii. Philip joined Extended Horizons in 2021 so that he can share his love of conservation and diving with everyone he meets from around the world!




Brad was born and raised in the Pacific Northwest. He was the person who said he would “never go scuba diving,” until a friend somehow convinced him to take a tiny leap of faith and give it a try. Life changed. Brad’s passion for diving this beautiful blue planet with others led him to become a PADI Master Scuba Diver Trainer in 2021. The beauty and tranquility of the underwater world captures him on each dive and he looks forward to sharing this with you!




Born on a small island in Brasil to a swim instructor mom and a surfer dad, Gabi has always felt a special connection to the water. After moving to Arizona at a young age, the ocean felt more like a dream than reality but the pool is where she felt most comfortable. While in college she discovered SCUBA diving in the lakes of Arizona, and soon after, she had the opportunity to dive in the Turks and Caicos Islands while doing marine biology research with a study abroad program. While in TCI she fell even more in love with the ocean and SCUBA diving but going back to the lake didn’t feel right, so she took a break from diving while she finished up her B.S. in Conservation Biology. As soon as she earned her degree, she went back to Brasil to visit family and ended up staying there to get her divemaster certification. Gabi enjoys learning about the “underwater world” and views every dive is an opportunity to see something new. She is excited to share her knowledge with you.




Maren began her dive career in 1999 at UC Santa Cruz, where she went from Open Water Diver through to DiveMaster, while earning a Bachelors degree in Psychology. She decided Maui would be the ideal place to follow her dreams and became a PADI Instructor in 2004. She started with Extended Horizons in 2005, and hasn’t looked back… in fact that’s kind of her thing, always looking forward. She’s now dive guiding with us as a fill-in only, because she has started a new career as a Paramedic and a mom! Maren’s can-do attitude and focus on quality customer service makes each charter with her special


  • star rating  Although we experienced equipment issues, for which we were compensated, this is the ONLY place in Maui for serious diver to rent equipment, bring you reg, computer, etc. but get... read more

    September 24, 2022

    star rating  I did the Reactivate course with Brad and had a fantastic time on my two dives. The course was very informative and covered all the skills I needed to refresh... read more

    September 21, 2022

    star rating  I took my Open water divers course with Extended horizons and I loved the entire experience. Eric helped me set up my diving days and was super accommodating to my... read more

    September 20, 2022
  • star rating  The staff at Extended Horizons was helpful, courteous and professional. I highly recommend them. Brad was out guide and he was fantastic. He was very helpful and an... read more

    September 15, 2022

    star rating  This was my first time diving, and our guide, Bruce, was professional and patient. We saw a lot of marine life including a sea turtle. MAKE SURE YOU TIP YOUR... read more

    September 13, 2022

    star rating  This was our first time scuba diving and likely not our last. Brad was a terrific guide! He put our minds at ease, gave thorough instructions, was very attentive to... read more

    September 11, 2022
  • star rating  We did a night dive at the iconic Mala Pier with Dive Master Brad. Brad held my hand as we entered the rocky entrance until I got my fins on,... read more

    September 10, 2022

    star rating  I took the night diver course and did 3 dives over 3 days. My teacher brad was extremely knowledgeable and informative. Will definitely dive with them again

    September 9, 2022

    star rating  Another fantastic dive experience from Extended Horizons, the only dive operator I will dive with when on Maui.

    The staff is super knowledgeable on the dive sites, and gives... read more

    September 9, 2022
  • star rating  Excellent service and friendly, helpful staff. We rented tanks, weights, and a dive flag, and we booked a guided twilight and night dive. The night dive was incredible. We saw... read more

    September 7, 2022

    star rating  Had an amazing time doing 2 different shore dives. Our dive master Gabi was awesome. She was very knowledgeable about the different Maui dive areas as well as all the... read more

    August 31, 2022

    star rating  Extended Horizons went out of their way to help me experience HI diving. Victoria went above and beyond in making sure I got the equipment that I needed.

    August 29, 2022
  • star rating  Excellent two tank twilight/night dive at Mala Pier. We got super lucky as there were only 2 of us who signed up for the shore dives. Philip (divemaster) was super... read more

    August 27, 2022

    star rating  My 11 year old daughter and I did a 1-tank shore dive with Extended Horizons and it was fantastic. Our divemaster Gabi was great - super helpful with my... read more

    August 17, 2022

    star rating  Awesome scuba shop! Highly recommended. I did four dives in two days and they were all amazing! Will definitely come back.

    August 15, 2022
  • star rating  Learning how to properly dive to be able to enjoy what you cannot see from the surface. Instructor Bruce made it very easy to learn for a first timer.

    August 13, 2022

    star rating  The 5 star resort we were staying at steered us to Extended Horizons Scuba. Our whole customer service experience with this dive shop has been outstanding. Brad, our... read more

    August 11, 2022

    star rating  It was very fun, the instructor was very informative and made the learning process very exciting. Really appreciated the amount of knowledge he showed about the fish during the dive... read more

    August 10, 2022
  • star rating  I called a number of dive operators to try and set up a 2-tank dive for our trip to Maui. Left a lot of messages.

    Victoria from Extended... read more

    August 7, 2022

    star rating  Discovering Scuba Diving was a wonderful experience. Brad did a great job. We learned a lot and had a wonderful morning seeing beautiful fished and the sea from another... read more

    August 5, 2022

    star rating  It was a great experience discovering scuba diving. The guide did a wonderful job and we really enjoyed what we learned and what we have seen. The was our first... read more

    August 3, 2022
  • star rating  Erik and team offer a truly outstanding intro to diving experience. Our instructor, Bruce, was fantastic and provided two personalized dives that we’ll never forget. From the quality of the... read more

    July 30, 2022

    star rating  I decided to book this night dive after I did a refresher course. I must say I was very anxious about my very first night dive, but my guides Bruce... read more

    July 27, 2022

    star rating  Scuba diving was lifechanging. Our guides Brad and Gaby were phenomenal. Highly recommend this to anyone who has never done scuba diving.

    July 25, 2022
  • star rating  Our instructor Brad was the perfect mixture of very knowledgable & very laid back. He put us at ease for our first night dive. An incredible experience! Ask for Brad!

    July 22, 2022

    star rating  We did a shore dive intro for my nephew and refresher for me. Brad and Francois were amazing and fun from the minute we arrived. Very safely conscious too. We... read more

    July 21, 2022

    star rating  Awesome. Been diving with them for 30 plus years. First class operation.

    I wanted my son’s first ocean dive to be amazing. He loved it.

    July 15, 2022
  • star rating  My wife and I had a wonderful experience doing a discovery dive. Bruce was a wonderful instructor. He was very professional, informative, and attentive. We will definitely be back for... read more

    Paul O
    July 13, 2022

    star rating  This was an amazing experience and the girls got out and said “I want to do it again.” Bruce was patient and thorough with a 12 and 15 year... read more

    July 11, 2022

    star rating  Eric, Rachel, and Captain Hollis made this diving trip exceptional. They made sure we were safe but also gave us the flexibility to explore Fish Rock and Cathedrals #1 at... read more

    July 10, 2022


We’ve been scuba diving in Maui and operating boat charters to Lanai since 1983. We offer the highest quality Maui scuba diving and Maui shore dives that can be found departing from the island’s west side. If you don’t already have your scuba certification, our Maui dive shop can help with that. Our commitment is to creating an experience for divers of all skill levels that is safe, fun, interesting and first class. No matter if you’re diving with us on Lanai or Maui, our scuba dive guides are trained in the local ocean ecology and have years of experience as Instructors.

Take the opportunity to dive Maui by joining our guides on their scuba diving tours that highlight marine behaviors. Any guide can point out the obvious like turtles, but our Maui scuba diving guides actually know the names of fish and can interpret marine life behavior patterns. Their years of experience scuba diving Maui and Lanai allow them to know where animals live, when they mate, and why they are acting unusual.

Extended Horizons leads by example, and has started a movement here on Maui by being one of the first dive shops in Maui to talk about saving the reef and actually take action. To prevent anchor damage, Extended Horizons spearheaded the actual putting in of the first 14 moorings on Lanai in the late 90’s and continues to sponsor local NGO’s, working hard to make Maui County, including Maui, Molokini and Lanai, a mooring friendly place. Additionally, Extended Horizons conducts semi-annual underwater reef clean-ups. So far we’ve removed over 1000 of pounds of marine debris off Maui County’s reefs over the years through impromptu as well as organized Reef Clean-Up events! Extended Horizons conducts semi-annual underwater reef clean-ups. Check it out on our SPECIAL EVENTS page!  And we are proud to have inspired many other local shops to follow suit.

We have the ONLY commercial marine tour boat on West Maui running on 100% biodiesel (not the only dive boat- the only commercial boat). Our commitment to run 100% is unique. While some Maui dive shops and businesses try to greenwash their image stating they run biodiesel, often this is just a small percentage blend. (Sometimes as little as 1%). Better yet, our biofuel is made locally in the State of Hawaii from recycled feedstocks by Pacific Biodiesel. It does cost slightly more than regular petrol diesel however it is much much much easier on the environment, reducing our carbon footprint (finprint?) by over 80% compared to petrol diesel.

With over 40 years in the scuba industry, we rely heavily on repeat business & word of mouth.

Everyone says “we’re the best” in Maui shore dives and Maui scuba diving trips. However, if you’re interested in Maui diving but prefer an unbiased opinion, check out what others say about our Maui diving by looking at reviewer sites like Yelp or TripAdvisor.

If you would like to dive in Maui or Lanai, please call us for scuba diving reservations! We will show you Maui and Lanai scuba diving with a quality difference such as using large tanks (80’s) for all divers, making computers a standard part of our rental gear, and showing you the unusual and rare sites that Maui and Lanai have to offer.

You can read about moorings on Maui and Lanai and help with the effort. Make a donation earmarked for Lanai moorings or Maui moorings by a click to MALAMA KAI. Donation is tax deductible and will make a difference on Maui’s and Lanai’s reefs for scuba divers and snorkelers today… and in the future.