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Calculator 6 of 10 — offshore wind

Offshore wind maintenance window calculator

Helicopter access to offshore wind turbines is measured in hoist cycles inside a usable weather window, not in flights. Enter the transit time to the field, the number of turbines, technicians per turbine and the length of the window, and this calculator returns how many turbine visits realistically fit, the flying involved and an indicative cost per turbine visited. Hoisting to a turbine requires trained technicians, an approved operator and conditions within limits — all confirmed by the wind farm operator.

The economics of helicopter access to wind are simple and unforgiving: a helicopter beats a vessel when the sea state stops the boat, when the window is short, or when a turbine is producing nothing while a technician waits ashore. Outside those conditions the CTV wins on cost.

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.

Turbine visits inside the window

4 of 4

4h 30m of productive on-task time after transit.

Total flying

2h 10m

Indicative sortie cost

Price on request

Whole-aircraft, per sortie.

Indicative cost per turbine visited

Price on request

  • Carrying 8 technicians exceeds the 7 seats available, so the aircraft must return to base or the campaign must be split across sorties.

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
Medium twin (AW109, H145) — 7 seats
Transit time, base to field
35 minutes
Turbines to visit
4
Technicians per turbine
2
Hoist cycle per turbine
12 minutes
Usable weather window
6 hours

Turbine visits inside the window

4 of 4

  • Total flying: 2h 10m
  • Indicative sortie cost: ⁣on-request⁣
  • Indicative cost per turbine visited: ⁣on-request⁣
Sample request text sent for human review

Offshore wind access: 4 turbines, 2 technicians each, 35 min transit, 6h usable window, hoist cycle 12 min. Estimated 4 visits per sortie. Indicative sortie band ⁣on-request⁣. Hoist-approved operator required; wind farm operator approval to be confirmed.

Example 2 · Smaller request

Aircraft class
Medium twin (AW109, H145) — 7 seats
Transit time, base to field
20 minutes
Turbines to visit
2
Technicians per turbine
1
Hoist cycle per turbine
7 minutes
Usable weather window
3.5 hours

Turbine visits inside the window

2 of 2

  • Total flying: 1h 00m
  • Indicative sortie cost: ⁣on-request⁣
  • Indicative cost per turbine visited: ⁣on-request⁣
Sample request text sent for human review

Offshore wind access: 2 turbines, 1 technicians each, 20 min transit, 3.5h usable window, hoist cycle 7 min. Estimated 2 visits per sortie. Indicative sortie band ⁣on-request⁣. Hoist-approved operator required; wind farm operator approval to be confirmed.

Example 3 · Larger request

Aircraft class
Medium twin (AW109, H145) — 7 seats
Transit time, base to field
55 minutes
Turbines to visit
6
Technicians per turbine
3
Hoist cycle per turbine
19 minutes
Usable weather window
9.5 hours

Turbine visits inside the window

6 of 6

  • Total flying: 4h 02m
  • Indicative sortie cost: ⁣on-request⁣
  • Indicative cost per turbine visited: ⁣on-request⁣
Sample request text sent for human review

Offshore wind access: 6 turbines, 3 technicians each, 55 min transit, 9.5h usable window, hoist cycle 19 min. Estimated 6 visits per sortie. Indicative sortie band ⁣on-request⁣. Hoist-approved operator required; wind farm operator approval 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

  • Transit time. Every minute to the field is a minute not spent hoisting.
  • Hoist cycle length, which depends on turbine type, platform layout and crew currency.
  • Wind, visibility and turbine shutdown coordination — turbines must be stopped and secured.
  • The technician count against usable seats after tools.
  • Whether the operator holds the wind farm operator's approval for hoist work at that field.

What this tool does not decide

  • Whether the wind farm operator approves helicopter access and turbine shutdown for the window.
  • Whether technicians hold current hoist and rescue training.
  • 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

Is a helicopter cheaper than a crew transfer vessel for wind?

Per visit, no — a CTV is almost always cheaper. A helicopter earns its cost when sea state stops the boat, when the window is short, or when lost generation outweighs the sortie.

Can technicians be hoisted onto any turbine?

No. The turbine must have a suitable hoist platform, the operator must be approved for that field, and the technicians must hold current hoist training.

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.

Offshore wind technician transferHoist-based turbine access.Offshore helicopter charterOffshore energy mission hub.Commercial vessel transferMerchant and industrial marine hub.Scotland charterHighlands, islands and estate missions.Macaé offshore charterCampos Basin's onshore aviation base.Guyana offshore charterStabroek-era offshore growth.Ciudad del Carmen offshoreBay of Campeche crew and technical movements.Crew change by helicopterRotation logistics hub.

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.Offshore crew change calculatorRotation sizing for offshore assets.Vessel transfer calculatorShip-to-shore and hoist missions.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.