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Calculator 4 of 10 — offshore energy

Offshore crew change calculator

An offshore crew change is sized by usable seats after survival equipment, the distance offshore, and whether the outbound and inbound crews travel back-to-back on the same rotation. Enter the rotation size and sector, and this calculator returns the number of sectors, total flying and an indicative whole-aircraft cost band. Offshore access depends on the asset owner's aviation standard, helideck status, passenger survival training and weather — all confirmed by the operator and the asset, not here.

Offshore rotations are the most approval-heavy missions SkyMatch handles. The arithmetic below is the easy half; the half that decides whether the flight happens is the approved-operator list, training validity and helideck status behind it.

Mission inputs

The figures above are a preliminary planning estimate for the route, aircraft category and passenger count you entered. They reflect estimated distance and flight time only — no price is shown and this is not an operator quotation. Only the licensed operator that flies the mission can confirm aircraft availability, landing permissions, operational feasibility and final pricing. Use this estimate to scope the trip, then send it to SkyMatch for a managed charter review.

Sectors to complete the rotation

2 × 55m offshore

Indicative whole-aircraft band Price on request for the crew change.

Usable seats per sector

9 of 10

After survival suits and offshore kit.

People moved

24

12 out, 12 back.

Indicative cost per person

Price on request

Whole-aircraft cost spread over both directions.

  • Offshore passengers normally need current survival training and a valid offshore medical. The asset owner sets the requirement; missing validity is the most common reason a rotation is refused at the gate.

Preliminary estimate for planning purposes only — not a confirmed price, availability or booking. Final routing, operational feasibility and pricing must be confirmed by the selected licensed operator.

Worked examples: inputs, planning estimate and request

Each example runs this calculator's own formula on the inputs shown. The results are planning estimates, not quotes. Prices, aircraft and timing are confirmed only after our team reviews the request and checks with licensed third-party operators, subject to availability.

Example 1 · Typical request

Aircraft class
Heavy twin (AW139, S-76) — 10 seats
Crew going out
12
Crew coming back
12
Sector, shore base to asset
55 minutes
Positioning time
20 minutes
Survival suits and offshore kit
Yes — standard offshore

Sectors to complete the rotation

2 × 55m offshore

  • Usable seats per sector: 9 of 10
  • People moved: 24
  • Indicative cost per person: ⁣on-request⁣
Sample request text sent for human review

Offshore crew change: 12 out / 12 back, 55 min sector from shore base, 2 sectors on a Heavy twin (AW139, S-76), survival kit carried. Indicative band ⁣on-request⁣. Asset owner aviation standard, helideck status and passenger training validity to be confirmed.

Example 2 · Smaller request

Aircraft class
Heavy twin (AW139, S-76) — 10 seats
Crew going out
7
Crew coming back
7
Sector, shore base to asset
35 minutes
Positioning time
10 minutes
Survival suits and offshore kit
Yes — standard offshore

Sectors to complete the rotation

1 × 35m offshore

  • Usable seats per sector: 9 of 10
  • People moved: 14
  • Indicative cost per person: ⁣on-request⁣
Sample request text sent for human review

Offshore crew change: 7 out / 7 back, 35 min sector from shore base, 1 sectors on a Heavy twin (AW139, S-76), survival kit carried. Indicative band ⁣on-request⁣. Asset owner aviation standard, helideck status and passenger training validity to be confirmed.

Example 3 · Larger request

Aircraft class
Heavy twin (AW139, S-76) — 10 seats
Crew going out
19
Crew coming back
19
Sector, shore base to asset
90 minutes
Positioning time
30 minutes
Survival suits and offshore kit
Yes — standard offshore

Sectors to complete the rotation

3 × 1h 30m offshore

  • Usable seats per sector: 9 of 10
  • People moved: 38
  • Indicative cost per person: ⁣on-request⁣
Sample request text sent for human review

Offshore crew change: 19 out / 19 back, 90 min sector from shore base, 3 sectors on a Heavy twin (AW139, S-76), survival kit carried. Indicative band ⁣on-request⁣. Asset owner aviation standard, helideck status and passenger training validity to be confirmed.

Turn this estimate into a mission request

The figures above are a planning frame, not an offer. Send the mission and SkyMatch reviews it, researches operators holding the relevant approvals and comes back with current options. Your inputs are carried across — nothing needs retyping.

Request current operator optionsCheck mission feasibility

See how a request becomes a confirmed flight — review, operator options, written confirmation.

What actually moves this number

  • The asset owner's approved-operator list — in many basins this is the binding constraint, not price.
  • Distance offshore, which drives fuel reserves, aircraft class and whether a mid-point is needed.
  • Survival equipment and offshore baggage, which cost usable seats.
  • Rotation balance. Part-empty legs in one direction are pure waste.
  • Weather and sea state, which re-time offshore rotations more often than any other mission type.

What this tool does not decide

  • Whether the asset accepts the operator, and whether the helideck is currently certified and open.
  • Whether passenger survival training and medicals are valid on the day.
  • Whether weather, sea state, daylight and diversion planning support the timing on the day.
  • Whether passenger training, medicals and site inductions are valid at the time of flight.
  • The binding price. Operators quote; this tool frames the budget conversation.

SkyMatch Group is an independent helicopter charter broker and a human-reviewed mission platform. It does not operate aircraft. Every flight is performed by an independent licensed operator, and every introduction is approved by SkyMatch before it happens.

Frequently asked questions

Do offshore passengers need survival training?

Almost always, together with a valid offshore medical and a pre-flight briefing. The asset owner sets the standard; SkyMatch and the broker process do not waive it.

Why is offshore charter more expensive than onshore?

Offshore-configured twins, over-water fuel reserves, survival equipment, standby and diversion planning all cost more, and the approved fleet in any given basin is small.

Why is the cost shown as a band rather than a price?

Helicopters are chartered whole-aircraft, per mission. The final figure depends on which airframe is genuinely available, where it is based, positioning distance, standby and waiting, fuel and handling, permits and time of day. A band is honest at planning stage; a single number would not be.

Who confirms that this mission can actually happen?

The performing operator, together with the asset owner, site or vessel controlling the destination and the relevant authorities. They confirm aircraft, availability, permits, landing or hoist approval, weather limits and safety. SkyMatch structures and reviews the mission; it does not confirm operational facts.

Does this calculator book a helicopter?

No. It produces a planning estimate. SkyMatch Group is an independent broker and a human-reviewed mission platform: the request is reviewed, suitable licensed operators are researched, and an introduction happens only once SkyMatch approves it. Operators issue binding quotes and confirm feasibility.

Markets this calculator is built for

The same inputs, applied to the industrial regions where these missions actually run.

Ciudad del Carmen offshoreBay of Campeche crew and technical movements.Campeche offshore charterContracted-fleet market, ad-hoc assessed case by case.Macaé offshore charterCampos Basin's onshore aviation base.Campos Basin charterMature Brazilian offshore basin.Santos Basin charterPre-salt long-sector missions.Guyana offshore charterStabroek-era offshore growth.Georgetown FPSO transfersShore base to floating production.Paramaribo charterSuriname interior and offshore staging.North Sea offshore charterUK, Norwegian, Dutch and Danish sectors.North West Shelf offshore charterKarratha, Broome and Learmonth staging.Gulf of Mexico offshore charterCoastal bases to Gulf installations.Malaysia offshore charterPeninsular and Borneo offshore sectors.

Related planning tools

Industrial mission cost calculatorWhole-aircraft cost band for one mission.Remote mine-site calculatorRotations, sectors and cost per head.Crew mobilisation calculatorMoving a whole team to a project.Vessel transfer calculatorShip-to-shore and hoist missions.Wind maintenance window calculatorTurbine visits inside a weather window.Multi-site industrial day calculatorHow many sites fit in one day.

Using an AI assistant, or buying through procurement?

SkyMatch reviews each helicopter charter request and arranges the flight. Availability, permits, landing permission, weather, route feasibility and final price are checked for each request and confirmed in writing before you commit. Estimates and directories on this site support research only.

AI & procurement: how SkyMatch worksSubmit Flight Request

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How long is a helicopter ride? Times by distance

Straight-line air-time estimates at a typical cruise of about 150 mph. Add start-up, taxi and any routing around restricted airspace; the licensed operator confirms the real time for each flight. Price on request.

How long is a 2-mile helicopter ride?

About 1 minutes of flying time for 2 miles in a straight line, before start-up and landing. Weather, routing and the aircraft type can change this, so the licensed operator confirms the time once you request a quote.

How long is a 5-mile helicopter ride?

About 2 minutes of flying time for 5 miles in a straight line, before start-up and landing. Weather, routing and the aircraft type can change this, so the licensed operator confirms the time once you request a quote.

How long is a 10-mile helicopter ride?

About 4 minutes of flying time for 10 miles in a straight line, before start-up and landing. Weather, routing and the aircraft type can change this, so the licensed operator confirms the time once you request a quote.

How long is a 15-mile helicopter ride?

About 6 minutes of flying time for 15 miles in a straight line, before start-up and landing. Weather, routing and the aircraft type can change this, so the licensed operator confirms the time once you request a quote.

How long is a 20-mile helicopter ride?

About 8 minutes of flying time for 20 miles in a straight line, before start-up and landing. Weather, routing and the aircraft type can change this, so the licensed operator confirms the time once you request a quote.

How long is a 25-mile helicopter ride?

About 10 minutes of flying time for 25 miles in a straight line, before start-up and landing. Weather, routing and the aircraft type can change this, so the licensed operator confirms the time once you request a quote.

How long is a 30-mile helicopter ride?

About 12 minutes of flying time for 30 miles in a straight line, before start-up and landing. Weather, routing and the aircraft type can change this, so the licensed operator confirms the time once you request a quote.

How long is a 50-mile helicopter ride?

About 20 minutes of flying time for 50 miles in a straight line, before start-up and landing. Weather, routing and the aircraft type can change this, so the licensed operator confirms the time once you request a quote.

How long is a 100-mile helicopter ride?

About 40 minutes of flying time for 100 miles in a straight line, before start-up and landing. Weather, routing and the aircraft type can change this, so the licensed operator confirms the time once you request a quote.