Interesting Maritime Roaming SIM.

[rfranzq]

Of course, being a Filipino might help make this useful.
The market is there apparently!

Close to 500,000 Filipino seafarers are serving on international commercial fleets as of end-2012.

The Globe Seafarer SIM Card can be used on most networks using a global interconnection with over 650 GSM networks worldwide.

Does any other roaming SIM claim 650 GSM networks?
Also, landlocked countries might not be available.
Tough luck Paraguay, Switerland, Slovakia!
Then again maybe the Rhine and the Danube have Filipino seafarers on them.