I don't have any particular advice, especially shipborne. The only time I used a straight was in the very early days, in the jungle area of Honduras. We had to go months without resupply. My shaves weren't that great, but you couldn't carry enough cartridges. The locals would strop on the sides of a tire. Only the officers could afford razors. The enlisted asked to have our disposable blades when we were done with them ,poor souls.

My only advice is if you like shaving don't hold back on gear and protect it from every idiot out there.