2008 December 4 update: During a discussion at ptboat.org's forum, I noticed that several elements were moved around, maybe after the 138 (when a number of changes were made to the boat). Please send an e-mail if you know exactly when the changes were made. The large buttons on the left side top and bottom were swapped with the covered button moved from the bottom to the top. Also, the two small unmarked pushbuttons (indicators?) for the red and green pilot lights were moved from the top of the panel to the bottom. Images of JFK in the 109 show the original style. Here is a larger image of the early panel showing the labels of the individual controls. See the thread at ptboat.org's forum named "ELCO Bridge" for a nice image of the later style.

The following images show dimensions for the control panel on an ELCO 80' 103 class PT boat as best as I can determine, mostly from an ELCO plan and images. John Drain's site was also very helpful decyphering some of the labeling text that was fuzzy. As usual, feel free to help. Let me know any errors and added details would be very welcome. According to the plan there may be additional print and finer range division marks on the gauge faces but I could not see these on any image I have.

The control panel looks like it remained the same until very late in production. A shot of the 577 shows what looks like this same panel. The later boats (731 - 790?) had separate panels introduced for the switches and gauges with the gauge panel above the bridge surface instead of sunk below as found in the 103 class.