PBM Mariner -5A Tire Dimensions (8 Viewers)

[beldridg]

I'm trying to confirm a wreck identification off Point Loma, California. Our current belief is that this is PBM -5A 122067. I've actually looked up the history of every single of the PBM -5A built.

However, the fact that it is a -5A variant relies on a tire found at the debris field. I've made some crude approximations of the dimensions by using a known diameter of the silver bar across a dive reel that we place inside the tire when we were running line to find new debris objects. I've attached a rough approximation of a few different dimensions based on that reference. Of course, it isn't going to be perfect and I'm going to try to get back to the site to actually measure it, but in the meantime, I'm wondering if anybody has actual dimensions of a -5A rear tire?

Here are some of the blog posts I have written about this wreck:

Martin PBM Mariner (San Diego, 100+ fsw) - Wrecked in my rEvo

Background I had first heard about a PBM Mariner wing section from Steve Lawson last year. Since then, Tyler Stalter and I had spent quite a few days and dives trying to find the elusive wing and ended up empty handed on all of those dives. Tyler had been at it a lot longer trying […]

wreckedinmyrevo.com

PBM Mariner Debris Field Exploratory Dives (San Diego, CA) - Wrecked in my rEvo

Background After our second dive on the PBM Mariner, we spent a little time scanning the surrounding area to look for more debris. Tyler had found the tire section a short distance away and we had a feeling there might be more. Lora’s new sidescan and sonar system on the Marissa are really...

wreckedinmyrevo.com

PBM Mariner Photogrammetry Model (San Diego - 100+ fsw) - Wrecked in my rEvo

Background Tyler and I first dove the PBM Mariner a couple weeks ago. During that dive, we had very limited visibility so taking pictures was challenging and I built a photogrammetry model based on those photos. It came out relatively well but was incomplete and I didn’t get all of the pictures...

wreckedinmyrevo.com

PBM Mariner Wreck: Side-by-Side Photogrammetry Model Comparisons - Wrecked in my rEvo

The author revisits the PBM Mariner wreck off Point Loma to improve a previous photogrammetry model, dealing with minor equipment issues and poor surface conditions during the dive. The new model features enhanced color and detail, providing a more accurate visual document of the historically...

wreckedinmyrevo.com

Thanks for any help!

- brett

 

[cvairwerks]

Brett: Best bet is to see if you can get one of the docents at Pima to grab the tire size off the 5A on display. I haven't found a manual for the 5A in all my looking over the years.