Hi Dave, I'm sorry, we know nothing about this at all. We just have standard VOA visas. We have to get them renewed every 2 months (no more 6-month extensions) but we can stay up to 3 years. Don't know how long the boat can stay, or what is required to extend that. Sorry.
Hi Dave, No problem. We don't know the Davao area that well, but we've sailed in & out of HOV Marina on Samal Island, & anchored at a few places in the bay.