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Great Lakes Shipwreck Preservation Society
Dedicated to Saving our Shipwrecks "From Prevention to Preservation"
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Website Updated

GLSPS Annual Fundraiser!!

UMSAT Show Website

2020 UMSAT Show Hanging Poster

2020 UMSAT Show Advertising Front of Postcard

2020 UMSAT Show Advertising Back of Postcard

Date and Venue for 2020 UMSAT Show!!

April 3 - 4, 2020


Fred Stonehouse

Maritime Historian and Superb Story Teller

More Speakers

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 12:00 AM

For more information on the 2019 UMSAT show, and the upcoming 2020 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

2020 UMSAT Show Exhibitors Contract

UMSAT Show 2020 Exhibitors Sponsors Registration Form

  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!

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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

HomeMayflower Documentation

Shipwreck Mayflower Documentation Project

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This summer, the GLSPS received a grant award from the Minnesota Lake Superior Coastal Program. This grant divided the cost of the documentation of both the Mayflower and the Wallace with the GLSPS.   This year, Lake Superior showed us how tough things can get on the lake!  On both of the original scheduled trips, we were not able to dive on the Mayflower due to weather and waves.  In July, Steve Daniel captained the Preservation with Co-Captain Ken Knutsen to the Mayflower. Documenters included: Pat Olson, Linda Negus Jim Christenson, Tim Pranke, Bill Wallace, Pete McConnell, Helen Wright and Emma Wallace.  When we arrived at the Mayflower the waves were 1 to 3’ and growing.  For safety, the dive was canceled and we returned to the marina. On Sunday, Helen reported white caps out on the lake and stronger winds.  Sunday’s trip was then canceled.

We scheduled another trip out in September, and this time we had perfect weather.  To speed up the process of finding the buoy, Tim P. and Pete M met Corey Daniel at the boat launch and left in a 17’ Zodiac to get the line and have it ready for the Preservation.  It took a little longer then planned, but we were able to find it.  The first Team of divers, including: Byron Meyer, Corey D. and Pete M went down to place the Bass Line used to measure the location of artifacts on the wreck.  Byron held the line at the Bow and Corey swam to the Stern.  When the line was in place and verified that it did not go around objects and/or over taller objects, Pete M signaled the other divers to secure it.  Steve D. photographed the placing of the baseline.  The next team, Tim Pranke and Phil Kerber entered the water and measured the position and size of the Starboard anchor.

Thanks to all who made it out on the documentation dives/boat ride this summer.  I hope to see everyone out again next year on one or more of our future documentation trips.

Next year we have more dives scheduled to document the Mayflower.  We welcome all members with advanced certification to sign up and join us in documenting the shipwreck.  Documentation gives a great incite into the construction of a ship.  When diving a shipwreck, you may not pay close attention to some of the more detailed sections.  When you document the wreck, you notice more details of the wreck and how it was constructed.

Our thanks to  Minnesota Lake Superior Coastal Program for supporting this effort.

The following are images shot in October 2006 prior to the start of the project when the visibility was terrific for this part of the lake.
Mayflower Documentation Project Photo Album

Byron fastening baseline.

Measuring Starboard Anchor.

Corey and Pete on safety stop.

Emma, Pat, and Pete work on Mayflower drawing.

A 2006 photo of the bow area and the wood stock starboard anchor.

2006 photo of the Mayflower Anchor windlass.

2006 photo of the port iron stock anchor.

2006 photo of the port side mooring bits; note how the ship is buried into the bottom.

Scow schooners were sailing barges with blunt bows.

2006 photo of the Mayflower port inside corner of the stern.