Offshore
Metocean data and forecasts for marine construction, subsea installation and heavy-lift operations.
The Challenge
Offshore construction and installation campaigns run on tight weather windows. A missed forecast or an underestimated design condition can mean delayed schedules, damaged equipment, or worse.
How Hermess Helps
Hermess combines long-term hindcast statistics with short-range operational forecasts so your team can plan campaigns with confidence and make go/no-go calls with the latest data in hand.
Deliverables
- Metocean design criteria for structures and foundations
- Workability and downtime statistics for installation planning
- Operational forecasts for lifting, piling and heavy-transport windows
- Site-specific wave, current and wind climatology
Metocean data portal-powered tools for offshore operations.
The data and applications behind our offshore work, from the underlying database to the tools your team can use directly.
Metocean data portal
Metocean data portal is a platform that enables humans and machines to seamlessly interact with all types of federated environmental data. Hindcasts, forecasts, climate predictions, observations and remote sensed data are all unified onto a common data model.
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Workability App
Trusted metocean statistics and time series powered by Metocean data portal reanalysis datasets. Choose any point directly from the interactive map to set your reanalysis or study area and generate wind and wave roses, trends, and key statistical insights, all exportable with a single click.
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Forecast App
Manage and visualise your forecast locations through an easy to use interface. Select your site of interest and generate reports ready to export. Set up and manage your distribution for full 2D spectral wave forecast, time series and reports.
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Hindcast validation
The validation app delivers reliable metocean statistics from Metocean data portal reanalysis, allowing users to validate and analyse ocean climate data with confidence.
Get started →Metocean Site Reports
Based on our long-term hindcast, statistics can be examined at monthly, seasonally or yearly scale within the entire model domain.
Standard analysis outputs for waves, winds and currents
- Metocean design criteria – return period values and extremes
- Persistence exceedence and non-exceedence matrices
- Joint probability distributions
Optimisation of Offshore Operations
For downtime assessment / workability analyses of installation and maintenance operations we use analytical techniques including Sequenced Downtime Analysis and persistence analysis, giving information on expected job completion times and/or persistence non-exceedence chances (% of time good weather windows) based on the operational criteria (e.g. limiting wind and wave conditions).
Sequenced Downtime Analysis is a powerful analytical tool which uses our long-term hindcast data to examine operability and weather downtime on complex offshore projects.
View services →Metocean hindcast data
You receive accurate, localised long term record of marine conditions at any open ocean or coastal location around the world. Metocean data is made available as gridded data (for spatial analysis), statistics or time-series. Our hindcast archives include the following metocean parameters:
Metocean parameters included
- Wind data — wind speed and direction
- Wave data — wave height, period and direction for total, swell and wind sea
- Currents — tidal, residual and combined
- Water level — tidal height/elevation, surge
- 2D wave spectra
Hindcast data is available from our global model as well as from high resolution regional models. Regional model data is available for the North Sea, Irish Sea, Baltic, Mediterranean, Arabian Gulf, US East coast, West coast Taiwan, Bass Strait & New Zealand.
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