Well, I’m not Alan but I do have one of those Myerchins, and the answer is yes, it can opened with one hand.
thanks Nate
Yes. Nate is correct. The shackle key cut out on the Myerchin blades is a good thumb hole once you get used to the shape. Here's another shot of my second generation plain edge and my first gen partially serrated with a fixed blade version. A word of caution, however, is if you're looking for a used Myerchin rigging knife they do not extend any warranty coverage if you're not the original owner. So, if you buy it on E-Bay, and it breaks, you'll just have to buy another one.
thanks Alan for the heads up on getting one from eBay- that's exactly what I was doing but it seems that they go for about the same price as a new one so I'll probably just get a brand new shiny one!
I'm a big fan of titanium and that knife looks so sleek and useful. definitely was looking for something that is OHO for when I'm out on the boat and with the added marlinspike it really looks like a winner.