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helicopters when flying in the offshore environment,
it is recommended that helicopter operators flying in
a particular area establish a cooperatively developed
Standard Operating Procedure (SOP) for VFR operating
altitudes. An example of such an SOP is
contained in this example.
1.10.2Recommended Practice Example
1.10.2.1Field Operations.Without compromising
minimum safe operating altitudes, helicopters working
within an offshore field constituting a cluster"
should use altitudes not to exceed 500 feet.
1.10.2.2En Route Operations
a)Helicopters operating below 750’ AGL should
avoid transitioning through offshore fields.
b)Helicopters en route to and from offshore
locations, below 3,000 feet, weather permitting,
should use en route altitudes as outlined in
TBL ENR 6.2−1.
TBL ENR 6.2−1
Magnetic Heading Altitude
0 to 179 750’
1750’
2750’
180 359 1250’
2250’
c)Area Agreements.See HSAC Area Agreement
Maps for operating procedures for onshore high
density traffic locations.
NOTE−
Pilots of helicopters operating VFR above 3,000 feet above
the surface should refer to the current Federal Aviation
Regulations (14 CFR Part 91), and SectionENR 1.4,
Paragraph1.7, Basic VFR Weather Minimums, of the AIP.
FIG ENR 6.2−2
Closed Helideck Marking
ENR 6.2−6 AIP
15 MAR 07 United States of America
Nineteenth Edition Federal Aviation Administration
d)Landing Lights.Aircraft landing lights
should be on to enhance aircraft identification:
1)During takeoff and landings;
2)In congested helicopter or fixed wing traffic
areas;
3)During reduced visibility; or,
4)Anytime safety could be enhanced.
1.11Offshore Helidecks/Landing
Communications
1.11.1Background.To enhance safety, and provide
appropriate time to prepare for helicopter
operations, the following is recommended when
anticipating a landing on an offshore helideck.
1.11.2Recommended Practices
1.11.2.1Before landing on an offshore helideck,
pilots are encouraged to establish communications
with the company owning or operating the helideck
if frequencies exist for that purpose.
1.11.2.2When impracticable, or if frequencies do
not exist, pilots or operations personnel should
attempt to contact the company owning or operating
the helideck by telephone. Contact should be made
before the pilot departs home base/point of departure
to advise of intentions and obtain landing permission
if necessary.
NOTE−
It is recommended that communications be established a
minimum of 10 minutes prior to planned arrival time. This
practice may be a requirement of some offshore
owner/operators.
NOTE−
1.See subparagraph 1.4 for Tanker Operations.
2.Private use Heliport. Offshore heliports are privately
owned/operated facilities and their use is limited to
persons having prior authorization to utilize the facility.
1.12Two (2) Helicopter Operations on Offshore
Helidecks
1.12.1Background.Standardized procedures can
enhance the safety of operating a second helicopter
on an offshore helideck, enabling pilots to
determine/maintain minimum operational parameters.
Orientation of the parked helicopter on the
helideck, wind and other factors may prohibit
multi−helicopter operations. More conservative
Rotor Diameter (RD) clearances may be required
under differing condition, i.e. temperature, wet deck,
wind (velocity/direction/gusts), obstacles, approach/
departure angles, etc. Operations are at the pilot’s
discretion.
1.12.2Recommended Practice.Helideck size,
structural weight capability, and type of main rotor on
the parked and operating helicopter will aid in
determining accessibility by a second helicopter.
Pilots should determine that multi−helicopter deck
operations are permitted by the helideck
owner/operator.
1.12.3Recommended Criteria
1.12.3.1Minimum one−third rotor diameter
clearance (1/3 RD).The landing helicopter maintains
a minimum 1/3 RD clearance between the tips of
its turning rotor and the closest part of a parked and
secured helicopter (rotors stopped and tied down).
1.12.3.2Three foot parking distance from deck
edge (3’).Helicopters operating on an offshore
helideck land or park the helicopter with a skid/wheel
assembly no closer than 3 feet from helideck edge.
1.12.3.3Tiedowns.Main rotors on all helicopters
that are shut down be properly secured (tied down) to
　
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