It seems that you have to start the application process to be able to download a copy of the DAN Annual Travel policy. DAN markets the policy, Generali US Branch is the insurance company underwriting the policy.
From the general exclusions section of the policy,
i. you or your Traveling Companion mountain climbing, bungee cord jumping, skydiving, parachuting, hang gliding, parasailing, caving, extreme skiing, heli-skiing, skiing outside marked trails, boxing, full contact martial arts, scuba diving below 120 feet (40 meters) or without a dive master, or travel on any air-supported device, other than on a regularly scheduled airline or air charter company;
The "Definitions" section of the policy lacks a definition of the term "dive master". Is the guide leading a dive the "dive master"? "Caving" isn't defined, but its not too hard to see where this exclusion might concern a diver. "Extreme Skiing" is similarly vague. How about a ballon ride - is this activity provided by an "air charter company"?
The medical coverage for the 3 plan tiers offered is minimal - $10-20-50k - a serious event will quickly exhaust these amounts. A US citizen on medicare should pay particular attention to these coverage amounts.
The trip cancellation and interruption offered at $2-3-5k (each category) reflects the higher probability of a covered event occurring. The "Emergency Assistance and Evacuation" has substantial limits of $100-150-250k - with a number of qualifiers - might be a valuable addition to DAN dive insurance coverage for some.
Perhaps DAN should write about the benefits and limitations of travel insurance in Alert Diver. In the end the DAN Annual Travel policies are inexpensive and the coverages afforded are minimal.