Federal Aviation Administration, DOT

Section 121.617

the United States, the certificate holder may dispatch an airplane over that
route or route segment if the pilot in
command and dispatcher find that
communication and navigation facilities equal to those required are available and are in satisfactory operating
condition.
[Doc. No. 6258, 29 FR 19222, Dec. 31, 1964, as
amended by Amdt. 121-253, 61 FR 2614, Jan.
26, 1996]

Section 121.609 Communication and navigation facilities: Supplemental operations.
No person may release an aircraft
over any route or route segment unless
communication and navigation facilities equal to those required by Section 121.121
are in satisfactory operating condition.
Section 121.611 Dispatch or flight release
under VFR.
No person may dispatch or release an
aircraft for VFR operation unless the
ceiling and visibility en route, as indicated by available weather reports or
forecasts, or any combination thereof,
are and will remain at or above applicable VFR minimums until the aircraft
arrives at the airport or airports specified in the dispatch or flight release.
Section 121.613 Dispatch or flight release
under IFR or over the top.
Except as provided in Section 121.615, no person may dispatch or release an aircraft
for operations under IFR or over-thetop, unless appropriate weather reports
or forecasts, or any combination thereof, indicate that the weather conditions will be at or above the authorized
minimums at the estimated time of arrival at the airport or airports to
which dispatched or released.
[Doc. No. 6258, 29 FR 19222, Dec. 31, 1964, as
amended by Amdt. 121-33, 32 FR 13912, Oct. 6,
1967]

Section 121.615 Dispatch or flight release
over water: Flag and supplemental
operations.
(a) No person may dispatch or release
an aircraft for a flight that involves extended overwater operation unless appropriate weather reports or forecasts
or any combination thereof, indicate
that the weather conditions will be at
or above the authorized minimums at

the estimated time of arrival at any
airport to which dispatched or released
or to any required alternate airport.
(b) Each certificate holder conducting a flag or supplemental operation or a domestic operation within
the State of Alaska shall conduct extended overwater operations under IFR
unless it shows that operating under
IFR is not necessary for safety.
(c) Each certificate holder conducting a flag or supplemental operation or a domestic operation within
the State of Alaska shall conduct other
overwater operations under IFR if the
Administrator determines that operation under IFR is necessary for safety.
(d) Each authorization to conduct extended overwater operations under
VFR and each requirement to conduct
other overwater operations under IFR
will be specified in the certificate holder-s operations specifications.
[Doc. No. 6258, 29 FR 19222, Dec. 31, 1964, as
amended by Amdt. 121-33, 32 FR 13912, Oct. 6,
1967; Amdt. 121-253, 61 FR 2614, Jan. 26, 1996]

Section 121.617 Alternate airport for departure.
(a) If the weather conditions at the
airport of takeoff are below the landing
minimums in the certificate holder-s
operations specifications for that airport, no person may dispatch or release
an aircraft from that airport unless the
dispatch or flight release specifies an
alternate airport located within the
following distances from the airport of
takeoff:
(1) Aircraft having two engines. Not
more than one hour from the departure
airport at normal cruising speed in
still air with one engine inoperative.
(2) Aircraft having three or more engines. Not more than two hours from
the departure airport at normal cruising speed in still air with one engine
inoperative.
(b) For the purpose of paragraph (a)
of this section, the alternate airport
weather conditions must meet the requirements of the certificate holder-s
operations specifications.
(c) No person may dispatch or release
an aircraft from an airport unless he
lists each required alternate airport in
the dispatch or flight release.

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