TIDE for SAR Training, Planning, and Advisory Use

• SAR training officers preparing exercises and tabletop scenarios
• Civil protection and defence scenario-planning cells (non-operational)
• Volunteer sea-rescue organisations for training and community preparedness
• Research and academic groups studying drift, leeway, and decision support
• Port authorities and marina operators running man-overboard training drills

• Leeway table with 85 object categories. It combines the Allen & Plourde (1999) and Allen (2005) object categories with later USCG and Breivik et al. (2011) extensions. Categories include person-in-water, life rafts (4 / 6 / 10 / 20-person, with and without canopy), working skiffs, and cargo.
• Monte Carlo particle ensemble. Stochastic jibing is modelled as a Poisson process.
• Uses wind and surface currents from the deployment's integrated forecasts, plus Stokes drift from wave fields (Phillips 1977, deep-water, direction negated from MWD).
• Computation runs on the server and reports progress live via Server-Sent Events.
• Results follow the map time slider, so users can step back through a scenario without re-running it.

The leeway method (Allen 2005; Allen & Plourde 1999) consists of published coefficients that several operational drift-prediction systems use. TIDE implements the published coefficients and the Monte Carlo ensemble for training and analytical purposes. It is not a substitute for certified operational systems.

• Live vessel positions from AIS, where the deployment integrates a feed. These support training scenarios that include bystander traffic.
• Weather routing with an isochrone solver, for planning and training. It does not provide operational route guidance.
• Chart tools: distance, bearing, range rings, transect profiles.

TIDE is a Progressive Web App. When connectivity drops, the drift-simulation workflow keeps working with the last-fetched forecast fields. This supports drills at remote stations or on training vessels.

TIDE runs in the browser on WebGL 2.0, including Android devices with as little as 2 GB RAM. It works on the field tablets and older smartphones that volunteer organisations typically use.

Using the SAR edition requires accepting the terms of use. The AGB / Terms of Use include:

• Advisory and training use only; not operational SAR decision support.
• No warranty of fitness for operational use; liability capped at annual fees.
• Customer is responsible for ensuring any use complies with national rescue-authority regulations.

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