Interactive Model – Year 2024

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Database Information Shipwreck Pretoria

Basic Information

Name(s)  Pretoria
Registry  U.S.
Official Number 150872
Vessel Type Schooner Barge
Year Built 1900
Year Sank 1905
Hull Material Wood
Engine(s) None


Length 338 ft
Width 44 ft
Depth 23 ft

Vessel History

Complete Historic Information Link – ;

Wreck Site Information

Lake Superior
State or Province Wisconsin
50 ft
GPS Coordinates N 47° 05.332′  W 090° 23.306′
Site Description: The wreck lies in 30  to 50 ft of water east of Outer Island.  The wreckage consists of several large sections of sides, deck, and bottom and scattered smaller pieces.  This is a model of the major sections of the wreck including the bottom of the hull, the entire starboard side, a portion of the port side and the inverted forecastle deck with the anchor windlass attached. In 2005 GLSPS partnered with WHS to put back the boiler which was used to drive the steam powered windlass.  The boiler had been removed back in the 1960’s for salvage and sat for forty years in the back yard of Ed Erickson who was Bayfield’s mayor for a time.

Model Information


Photographer(s) Tamara Thomsen, Ken Merryman
Year Captured June 2024
Time it took to capture 80 min

Modeler Information

Modeler Ken Merryman
Date Completed 4-2024
Hours of input to complete 4 hrs

Technical Information


Camera – 2Canon 5d Mark IV in a Nauticam Housing with an 8” Dome Port
Lens – Canon EF Zoom 8-15mm set at 15 mm
Multi-Camera Rig – No
Camera Propulsion – DPV
Video or Stills – Stills
Number of images Submitted – 4,343
Image resolution (pixels) 6720 x4480
Lighting – Artificial & Natural
Number of lights – 4
Light Output Lumens 2- sets of 4 x10000

Model Information

Software Used Agisoft Metashape Professional Version 1.8.0 Build 13794
Data Format .jpg converted from RAW
Number of Source Images used – 4,342
Are these images original or adjusted; Adjusted
If Scale Bars, calibration length – 
Portion of the site covered: Complete coverage of this portion of the site.

Publishing Restrictions

Licensing Usage Restrictions CC BY-ND
Attributed to: Tamara Thomsen, Ken Merryman of

Resource Data in Database

Model  Yes
Source Images  Yes
Source CC .jpg
Number of Still Images 4,343
Video Clip None
Processing Report Yes
Camera Calibration .xml Yes


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