maritime_assess_position
Evaluate historical position quality and uncertainty by analyzing navigation era, source type, and date. Returns quality score, uncertainty radius, and drift modeling recommendations.
Instructions
Assess the quality and uncertainty of a historical position.
Evaluates a position based on the navigation technology available at the time, the source quality, and known factors. Returns a quality score, uncertainty radius, and recommendations for drift modelling and search planning.
Provide either a voyage_id, wreck_id, or explicit lat/lon coordinates. The assessment considers the era of navigation technology (cross-staff, backstaff, octant, chronometer) and the source description.
Args: voyage_id: Voyage identifier to assess its incident position wreck_id: Wreck identifier to assess its recorded position latitude: Explicit latitude in decimal degrees (WGS84) longitude: Explicit longitude in decimal degrees (WGS84) source_description: Description of position source for quality scoring. Keywords that improve scoring: "GPS", "surveyed", "multiple sources", "triangulated". Keywords that lower scoring: "dead reckoning", "approximate", "regional" date: Date for navigation era lookup (YYYY or YYYY-MM-DD), used when no voyage_id or wreck_id is provided output_mode: Response format - "json" (default) or "text"
Returns: JSON or text with position quality assessment
Tips for LLMs: - Provide voyage_id or wreck_id to automatically look up the position and date from the archive - The quality_score ranges from 0 (unknown) to 1 (precise GPS) - uncertainty_radius_km defines the search area envelope - The recommendations field provides actionable guidance for drift modelling and search planning - For modern surveyed wrecks, include "GPS" or "surveyed" in source_description to get a precise assessment - For historical positions from ship logs, include "dead reckoning" to reflect the navigational limitations - Navigation accuracy improved over time: 1595-1650 (~30km), 1650-1700 (~25km), 1700-1760 (~20km), 1760-1795 (~10km)
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| voyage_id | No | ||
| wreck_id | No | ||
| latitude | No | ||
| longitude | No | ||
| source_description | No | ||
| date | No | ||
| output_mode | No | json |