This is why I have always advised against anything AIG. They're expensive and they find a way to deny any claim that isn't 1) Diver's illness or accident caused missing trip and doctor's letters to prove it. 2) Diver's loss of employment forcing cancellation, also requiring proof.
I had AIG coverage for my household goods when I shipped them from Ecuador to US. Shipper caused a big problem that caused many things of great value (paintings, etc) to be damaged with mold and mildew. Claim denied.
Had clients who once missed their Cocos liveaboard due to the airline deciding to enforce YF vaccinations without telling anyone and refusing to allow them to board in Quito. Undersea Hunter didn't know anything about the enforcement. Agency who chartered the liveaboard didn't know anything about it. Clients had booked their own flights from Quito to Costa Rica. AIG refused to cover.
Only the Dive Assure coverage has a liveaboard rider, but I far prefer DAN dive insurance because of the way they manage accidents. DAN worries about the diver first, the cost second. As it should be.
DAN insurance is AIG insurance, the excerpt below is from their downloadable insurance handbook:
"...DAN TravelAssist services are provided under a service contract with Travel Guard. U.S. benefits are covered by insurance that is underwritten by The United States Life Insurance Company in the City of New York. Service fees and/or premiums for DAN TravelAssist are paid from DAN membership funds. Policies issued by The United States Life Insurance Company in the City of New York (US Life). Issuing company US Life is responsible for financial obligations of insurance products and is a member of American International Group, Inc. (AIG). Products may not be available in all states and product features may vary by state..."
Plus older divers may not have much choice. Currently DAN is denying coverage with their top plan for older divers - and that may be the only DAN plan available in some US states, see link below:
I'm 71 and DAN won't insure me -- now what?