Yo Nathan! On Mon, 14 Jun 2021 12:09:19 -0700 Nathan Owens wrote: > Why wouldn't you recommend the hat? A good recommendation needs to know a bit more about your use case and expectations. The Adafruit chip is several generations old (MT3333?), and the built-in antenna is no good inside a building. You want a newer chip that does multi constellations, and has an antenna connector. The Adafruit has a u.fl conenctor, I much prefer SMA. > Anything you'd recommend that is > actually purchasable? Uputronics makes good HATs: https://store.uputronics.com/index.php?route=product/category&path=60_64 NEO-M8Q for 44 Pounds, ZED-F9P for 240 Pounds. They have good support and fast ship to USA. Also common to get a GPS on a breakout board and jumper it to the Pi. Sparkfun has a lot of models: https://www.sparkfun.com/search/results?term=gps Abay is often the besst place to look. Here is an interesting new part: https://www.ebay.com/itm/264810984552?_trkparms=aid%3D1110006%26algo%3DHOMESPLICE.SIM%26ao%3D1%26asc%3D232899%26meid%3Ded97b963bf6d4fe88b2164c0af008895%26pid%3D101113%26rk%3D4%26rkt%3D12%26sd%3D384222062283%26itm%3D264810984552%26pmt%3D0%26noa%3D1%26pg%3D2563228%26algv%3DDefaultOrganic&_trksid=p2563228.c101113.m2108 The MAX-M8Q is good, not great. > I can't seem to find any of the Navisys units, > and ideally non-USB would be better? You have to call them direct. Minimum order quantity is non-trivial. YOu see them on etsy and ebay when somoeone buys a case of them. RGDS GARY --------------------------------------------------------------------------- Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703 gem@rellim.com Tel:+1 541 382 8588 Veritas liberabit vos. -- Quid est veritas? "If you can't measure it, you can't improve it." - Lord Kelvin