On Feb 9, 1:31*am, David Dyck wrote:
On Feb 8, 12:05*pm, Tom Gardner wrote:

I would expect the phrasing to mutated to "sense and avoid". I would
guess that "sense" implies some form of transponder in all aerial
vehicles.

But not all aerial vehicles are even required to have electrical
systems, never mind transponders....

That's correct so long as you use "are". If you change it to
"will be" then the truth is not self evident.