New Wreck found in Lake Washington

This image is of Target 420.  It is located in 200' of fresh water and is in the area where we are looking for a historically significant wreck.  Despite a close pass with a towfish in the top image the shadow is not as strong as hoped.  There is clearly deck structure but the layout is not fully clear.  The image is showing a hard roof remains intact and is reflecting strongly.  Significant erosion at the stern is evident from the gently lake currents moving the mud. 

The other two images were taken to show other structural components.  The second image shows a hull shape similar to a large sailboat and the bottom image shows what may be a mast that has collapsed forward.