Robert M. Gary wrote:
B A R R Y wrote:
N2310D wrote:
The owner lists all five pilots on the policy. The pilots pay an equal
share of the premium cost. The insurance company is happy with the
arrangement.

That makes sense.

It's also less informal than I originally would have thought, because
all of you ARE listed together on paper somewhere.

You have to be. For a pilot to be covered under the open warranty he
has to be restricted to "causal" access to the aircraft. Rule of thumb
in the industry is that if the pilot has his own set of keys then its
probably not "casual access".

That's how I understand it, and that's how my two owner aircraft is set
up. We both coughed up 1/2 the equity, it's registered to both of us,
etc...

However, N2310D's original description sounded a lot like a single owner
renting or bartering blocks of time to cover his ownership costs.