Mark Gerner, Core Team

Mark Gerner is the founder of PWCOFFSHORE.COM. He has countless (well over a 1000 trips to Catalina on a JetSki) and has over 23 years of experience on the water. He is a Memorial Mark Hahn 300 Mile Race National Endurance Champion, a Triple Crown of Offshore Overall Champion, a Mark Hahn 300 Mile Race Iron man Champion, was voted the USA offshore racer of the year in 2009, is a member of the offshore racing "Dream Team," has had overall podium finishes in 2018 and 2019 (2nd overall) at the Mark Hahn 300 Mile Arizona Race, Gerner has more podiums at the Long Beach to Catalina and Back race (LB2CAT) than most racers combined, has the second fastest time in the history of the LB2CAT Race; making it from the Queen Mary in Long Beach to Catalina/Avalon and back to the Queen Mary in 51 minutes and 52 seconds in 2015.  Gerner has been an advocate for offshore and endurance riding, racers, race promoters and rider safety; In 2019 Gerner was awarded the "Ambassador Award for Offshore and Endurance Racing" for his advocacy of endurance racing. Gerner is a former US Marine Corps Infantry Officer and avid supporter of various veterans charities across the United States. 

KC Heidler retired from racing in 2017 and was inducted into the PWCOFFSHORE Hall of Fame in 2019!

Leaving Juan Francisco San Martine and Mark Gerner as the remaining racers of  the PWCOFFSHORE Racing element  


Juan Francisco SanMartin, Core Group, PWCOFFSHORE Uruguay


 "Juanfa" is a citizen of Uruguay and an exceptionally tough rough water rider. He is a multi-champion endurance racer that includes class wins at the LB2CAT, multiple podium races at the Mark Hahn 300 Mile Race (overall podiums the last two years straight; 2018 and 2019 - 2nd Overall), a Brazilian National Champion and much more! Check him out

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David Tew, Executive Sponsor

PWCOFFSHORE.COM Racing Executive Sponsor David Tew 

of Southern California, USA

June 26, 2013

Dave Tew Selected to PWCOFFSHORE.COM Racing as Executive Sponsor 

PWCOFFSHORE.COM Racing is pleased to announce the selection of David Tew as Executive Sponsor at PWCOFFSHORE.COM Racing. As an Executive Sponsor, Dave will engage in watercraft related community outreach, collaborate with PWC / watercraft dealers across the country and continue to act as a liaison with recreational riders who have expressed an interest in getting involved in offshore and/or endurance racing and act as an advocate for offshore riding and racing. 

Dave is exceptionally passionate about offshore riding, racing, Pit Crew methodology and Endurance Racing. Few members of the PWC community have done more than Dave in promoting collaboration and community outreach in engaging recreational PWC riders to ride offshore and when appropriate, play a role in assisting that rider in making the transition from recreational rider to offshore and endurance racer. The consummate professional, Dave is always there to assist a rider in need. Over the last 25 years on the water, Dave has spent countless hours introducing new riders to the water, educating riders on safety related topics and providing guidance to recreational riders as they transition to various forms of PWC racing. 

“PWCOFFSHORE had maintained a relationship with Dave for many years, the criteria for selection for the Executive Sponsor role fits Dave’s strengths perfectly” said PWCOFFSHORE Founder Mark Gerner. “We are pleased to take our relationship with Dave to the next level, he’s a great person that is always there for people and we are honored to be affiliated with him.”


Leader in the development of current PWC Pro Am Endurance Pit Crew methodology

Member of Mark Hahn Memorial Pit Teams winning Top Pit Crew in 2010 & Best Appearing Pit Crew in 2012.

Member of the American Watercraft Association H20 Responders. 

Member of K38 Watercraft; Assisted with countless offshore races & numerous IJSBA World Finals events. Honored with the 2011 K38 Water Safety Appreciation Award for volunteering in both racing and military events.

DJSA Racing ‘Team Orange’ Safety Member.

Founding member and Vice President of the American Watercraft Association (AWA) So Cal Watercraft Club since 2005. This has involved promoting the rights of PWC riders, mentoring others in starting area clubs, augmenting focus on safe PWC riding and drowning prevention.

Member of multiple AWA PWC Clubs from across the country.

Member of the K38 Chapter of the National Drowning Prevention Alliance (NDPA).

Dave Tew Endurance Racing Titles: 

2008 LB2Cat Amateur Class 2 National Offshore Champion. This was the last Class Win at the LB2CAT for Polaris and the last craft to win a class on a 2–stroke.

2008 DJSA California State Sprint Champion.

2009 Mark Hahn Memorial 300 Vet Masters Open Champion (with race partner Kim Bushong).

2014 Vet Master Class Offshore National Champion 

2014 PWCOFFSHORE.COM Award For Excellence 

Race Boats that have flown the family flag of an arm holding an upright cutlass: 

#33 2012 Kawasaki Ultra 300LX

#33 2007 Kawasaki Ultra 250X – Lord Black Racing sponsored

#33 2004 Polaris - P3 Matrix 200-Factory Pipe triple pipe, 1200cc, 2 stroke

#33 2001 Polaris Virage TX

Bio, David ‘Pirate’ Tew:

Born in Hollywood Ca., where both his parents met. The son of a member of the British Royal Air Force, Dave’s Father traveled the world taking jobs at each stop. His Mother traveled to the United States from Ireland for what she thought would be a short visit to assist her older sister with her children as they immigrated to the United States from The Republic of Ireland.

Always giving to others, PWCOFFSHORE.COM expresses ongoing gratitude for the time and effort (all volunteer) Dave gives back.   


Mike Arnold, Pit Crew Chief


Mike Arnold is a former US Marine Gunnery Sergeant who served our country for over twenty years as a Marine.  A former PWC Racer and athlete and a master of Pit Crew process and leadership, Mike Arnold has been invaluable to Mark Gerner and the Pit Crew at the annual Mark Hahn 300 Mile race in Arizona.  Mike has set the standard and the Crew has received countless awards for their amazing performance.  

Consistent members of the volunteer Pit Crew are Aaron Cress, Steve Rasmussen, Lauren Rasmussen, Zack Goldstein, Rod Mullinax, Kodi Mullinax, and Dane.

PWCOFFSHORE Racing expresses ongoing gratitude for the time and effort (all volunteer) Mike Arnold and this group has put in to making this Pit Crew that everyone watches and is known as THE best, most professional Pit Crew in the world.     


Check out the Mark Hahn Race and Pit Crew section for more about Gunny-Mike


Aaron Cress, Technical Advisor

Additional Information

Aaron Cress has provided technical guidance to PWCOFFSHORE.COM for many years.  A strong advocate for Kawasaki, Aaron's feedback to PWCOFFSHORE.COM has been invaluable.  Most recently Aaron was the Pit Crew MVP at the 2019 Mark Hahn 300 Mile Race.     

PWCOFFSHORE.COM expresses ongoing gratitude for the volunteer efforts Aaron has contributed to PWCOFFSHORE.COM and racing as a whole.

Learn More

Find Aaron at Dana Point, CA JetSki / Pure Watersports that also has an amazing selection of Kayaks.     


Read start to finish

 Take a boating safety class prior to riding or racing in the ocean.  Consult with the the US Coast Guard for safety training prior to riding in the ocean.  Seek out and participate in training from certified professionals prior to riding in the ocean.  This website is informational only. This site is intended for the review by adults only. No representation is made or warranty given as to its content. User assumes all risk of use of, its owners and its suppliers assume no responsibility for any loss or delay resulting from such use. Warning - although PWC riding is great fun, riding personal watercraft (PWC) in the ocean is not for the beginner and is for adults only. Offshore PWC / JetSki riding is extremely dangerous and can result in serious injury or death. The information on this site is for adults and strictly the opinion of the writers on this site. We are only PWC enthusiasts - please do your own research and make your own judgments regarding what products you purchase and how & where you ride your watercraft (PWC). We are not certified safety experts, mechanics nor are we certified mariners or certified maritime navigators. Do not take anything you read on this site as guidance from a "professional." By reading this site, you agree to take whatever information or input you receive from this site at your own risk. If you are inexperienced or a beginner we recommend against riding in the open ocean. We encourage you to take a boating safety course and consult with the Coast Guard regarding PWC, boating, proper safety and communications equipment, rider safety and maritime navigation before you consider riding PWC offshore, in the ocean. For more boating safety information, go to the Coast Guard's website at  for more information. Seek out formal boating and PWC related safety and training courses prior to riding in the ocean. Have fun and be safe and never ride in the ocean until you have received properly training.  Consult with the Coast Guard before you ride in the ocean!  All rights reserved;     Use of the PWCOFFSHORE.COM Logo without the written consent of PWCOFFSHORE.COM is strictly prohibited.   Stating affiliation with PWCOFFSHORE.COM without the written consent of PWCOFFSHORE.COM is strictly prohibited.