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Great Lakes Shipwreck Preservation Society
Dedicated to Preserving our Shipwrecks and Maritime History
"From Prevention to Preservation"
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Website Updated

GLSPS Annual Fundraiser!!

UMSAT Show Website

If we are allowed to have a physical Show
The Date and Venue for 2021 UMSAT Show!!

April 9 - 10, 2021

Friday Night at the Movies
7:00 to 10:00 PM

Saturday, 9:00 AM to 6:00 PM
Main Show

(Meet and Greet Party with Food and Beverages)
At The Holiday Inn Hospitality Room
(Next Door to Jimmy's)
7:00 PM to 11:00 PM


If we have a Virtual Show Only
The dates would be

April 6 - 10, 2021

There will be one speaker each night 
starting at 7:00 PM

Saturday will have two speakers and
the GLSPS Awards Event 
Stay tuned for the Lineup of Speakers for 2021

For more information on the upcoming 2021 UMSAT Show, please visit

If you are interested in joining the UMSAT Show Planning Committee, please email us at

Or, contact Mary Lillimo at "Show Chairperson", or Phil Kerber, "President", at

Here are the Links to Important Exhibitors Documents
  UMSAT Booth Table Layout at Jimmy's Event Center

We are always looking for speakers that would like to present a great topic about their scuba diving or adventure travel experiences.

Please let us know if you, or anyone you know, would like to be a star and speak at a future UMSAT Show!

Lake Superior Magazine Logo 2x1
Check out the most beautiful magazine ever produced in Northern Minnesota!

GLSPS Project Sponsors

Air Down There Scuba offers free air fills and special pricing on rental equipment while participating in GLSPS projects. Required to show GLSPS Membership Card! 
Thank you, Scott and Tracy!

Aquaventure Dive and Photo Center offers free air fills and special pricing on rental equipment while participating in GLSPS projects. You will be required to show your GLSPS Membership Card.  They have also loaned us a GoPro HD video camera for a few projects. Thank you, Steve and Jolene!

Videos produced by Steve at Aquaventure Dive and Photo Center filmed in Lake Michigan on a Milwaukee charter trip. Click on their above logo for information to join them on a charter to visit these shipwrecks.
Prins Willem
The Dredge 906

HomeLow Impact Shipwreck Diving Course

GLSPS Low Impact Shipwreck Diving Course

The development of a Low Impact Shipwreck Diving Course is another example of the exciting cutting edge programs GLSPS is initiating. Repairing damage to shipwrecks is where much of our work has been centered. But if we could teach divers the best diving techniques to minimize damage to these delicate sites, the benefits could be even more widespread. Respected scuba instructor Bill King designed the course outline with input from other experienced wreck divers. We then circulated the outline to all of the regional dive shops for comments. We were disappointed that no one responded. We did, however receive an independently created outline from Ryan LeBlanc of Ontario's SOS. It was surprising to see we were topic for topic in step with Ryan's outline.

Fall of 2000, we spent a weekend shooting the underwater video footage for a 10-minute class video on LISWD. However, the visibility was not the best, and in spring 2001 we attempted to return to re-shoot the video. Unfortunately mechanical difficulties kept us at the dock the entire weekend, so we missed a chance to improve the video with the much better spring visibility. In June of 2002, we returned to improve the video. Unfortunately the visibility still left something to be desired. Our hope was to create a top notch video of the techniques, which is really best done in excellent visibility. The other problem we encountered with early season shooting is that our actors' buoyancy skills that we wanted to demonstrate were a little rusty after a winter of hibernation. We are now planning on re-shooting much of the video in May in the Straights of Mackinac where in May 2003 we had 70 ft of visibility.

Low Impact Shipwreck Diving involves buoyancy control, sensitivity to the environment and common sense.

What are the three most important skills in LISWD?

Buoyancy Control!

Buoyancy Control!

Buoyancy Control!

Skilled wreck divers touch the wreck only lightly and infrequently.

Proper attitude and  fining techniques keep the wash from your fins from disturbing the silt on the deck below you.
Improper fining destroys visibility making it more difficult to navigate the wreck without touching it and removes the silt layer from the shipwreck. Experts believe the silt layer in some cases helps protect the shipwreck from deterioration.
When entering a hole or passage-way look before you pass through. Ask yourself whether you can pass through without abrading or colliding with the entrance frame. Minimize your profile and secure dangling equipment that can snag on shipwreck obstacles.
Dragging around heavy lights and accessories can abrade soft wood, tangle and dislodge fragile artifacts and can be a safety issue for the diver.
Submersible pressure gauges that are not secured can wedge in the darnedest places and cause minor damage to the wreck.
Minimize your need to touch the shipwreck Resist the temptation to turn valve handles and panel controls.  Eventually they will break off in your hand.