@midlifeflyer and
@dtuuri et al. FWIW and to add to the discussion, a pilot does not need to declare an emergency for an emergency to be declared.
10−2−5. EMERGENCY SITUATIONS
Consider that an aircraft emergency exists and inform the RCC or ARTCC when any of the following exist:
NOTE−
USAF facilities are only required to notify the ARTCC.
a. An emergency is declared by either:
1. The pilot.
2. Facility personnel.
3. Officials responsible for the operation of the aircraft.
I have declared emergencies as a controller when it was obvious one existed even though the pilot did not "declare." When doing it I did not always tell the pilot that an emergency had been declared. I figured why add to his stress level with such a harsh word. I just obtained the information required for emergencies, much of which was already known.
10−2−1. INFORMATION REQUIREMENTS
a. Start assistance as soon as enough information has been obtained upon which to act. Information requirements will vary, depending on the existing situation. Minimum required information for inflight emergencies is:
NOTE−
In the event of an ELT signal see para 10−2−10, Emergency
Locator Transmitter (ELT) Signals.
1. Aircraft identification and type.
2. Nature of the emergency.
3. Pilot’s desires.
b. After initiating action, obtain the following
items or any other pertinent information from the
pilot or aircraft operator, as necessary:
NOTE−
Normally, do not request this information from military
fighter-type aircraft that are at low altitudes (i.e., on
approach, immediately after departure, on a low level
route, etc.). However, request the position of an aircraft
that is not visually sighted or displayed on radar if the
location is not given by the pilot.
1. Aircraft altitude.
2. Fuel remaining in time.
3. Pilot reported weather.
4. Pilot capability for IFR flight.
5. Time and place of last known position.
6. Heading since last known position.
7. Airspeed.
8. Navigation equipment capability.
9. NAVAID signals received.
10. Visible landmarks.
11. Aircraft color.
12. Number of people on board.
13. Point of departure and destination.
14. Emergency equipment on board.