Aye,I have been working Offshore on a 35x 35 rotation and have done for the past 12 years 80 % of that time with just an entry stamp,I have only been questioned by the Immigration twice in that time,I just show them my seaman’s book plus a travel letter by my company,they seem to be okay with that..I know its not easy to apply for any visa as you need your passport to travel back to work. You can use an agency to arrange it for you they do it on about 3 to 4 weeks even faster if you pay extra..Thai visa Centre in BKK did it for me before.
Sometimes it does not allow you to add an address other times it does,I have done it twice now and only the second time it allowed me to add an address