Jurisdiction and operation
Record the intended operation and applicable framework without asking software to make the legal decision.
Flight Operations
Build a route draft with every unresolved gap in view.
Combine terrain and surface evidence, altitude, observers, airspace context and human controls in one UK-first planning workspace.
Flight planning evidence fixture
Hillcrest Survey Corridor
Five route points · two observers · 80 m AGL
Terrain sourcefixture-terrain-surface-v1
DatumSYNTHETIC-AMSL
Resolution1 m fixture
FindingBlocked + unknown
01 / Readiness rail
Six steps keep the next blocking action explicit.
The workflow is designed to accelerate preparation, not hide professional judgement behind a score. Blocking, warning and optional inputs remain separate.
Operator, pilot, aircraft and crew
Keep accountable people, aircraft, observer roles and supporting records together.
Route, altitude and volumes
Draw the route with an explicit AGL or AMSL model and inspect the complete calculation extent.
Airspace, site and ground risk
Attach time-bounded evidence and retain unavailable or unresolved sources as blocking checks.
LOS, observers, C2 and weather
Analyse every relevant route segment, show coverage by observer and preserve unobserved gaps.
Controls, review and evidence
Record mitigations and prepare a traceable draft pack for qualified review.
02 / What is analysed
A geometric visibility result with provenance, not a legal VLOS verdict.
Terrain-aware line of sight can support a review, but legal VLOS also depends on aircraft conspicuity, conditions, human performance, procedures and the applicable rules.
Route and altitude
Sample the planned polyline with explicit AGL or AMSL semantics and invalidate dependent results when inputs change.
Observer network
Attribute segment coverage to pilot and observer positions and retain every unobserved gap.
One scene
Terrain, surface, buildings and estimated vegetation use the same frozen evidence context across analysis and export.
Human verification tasks
Unknown source areas, visibility limits, site checks and authority evidence become visible tasks rather than clean defaults.
03 / Output boundary
Prepare the draft. Keep the decision with the accountable people.
The evidence lifecycle records analysis, review, signature and submission separately. Only an uploaded authority decision can record that final external state.