OPERATION TUNNEL — VIEWING MODEL IMPORT GUIDE
https://operationtunnel.org/sources#model-downloads

These six GLB viewing derivatives supply twelve warships in the interactive
scene. They group equivalent materials for rendering while preserving the
source triangles. They are not the original editable or print masters.

SCALE AND AXES
Each file is 100 display units long. Bow: -X. Up: +Y. Nominal waterline: Y=0.
To obtain the reconstruction's nominal full size in metres, multiply all
coordinates by nominal length / 100. Check your importer's unit conversion.

File                                Nominal length (m)   Metre multiplier
charybdis-batched.glb                156.0576             1.560576
limbourne-batched.glb                85.344               0.85344
grenville-batched.glb                110.57               1.1057
rocket-batched.glb                   109.19               1.0919
hunt-iii-batched.glb                 85.344               0.85344
type-39-batched.glb                  102.5                1.025

Example: a desired 1:200 model of Limbourne is nominally 426.72 mm long.
Use the measured imported hull length to set the scale. Do not assume that
100 display units equals 100 metres of the historical ship.

VERSIONS AND EVIDENCE
- Charybdis: detailed v0.1.0 ship-model derivative.
- Limbourne: detailed Revision 3 derivative. The separate educational ship
  explorer continues to use Revision 2; these files must not be interchanged
  without respecting their separate section mappings.
- Grenville and Rocket: provisional class studies.
- Hunt Type III: one shared study for Talybont, Stevenstone and Wensleydale.
- Type 39: one shared study for T22, T23, T25, T26 and T27.
- Munsterland and the close escort are markers; no hull is supplied here.

Nominal dimensions and reconstructed forms do not certify final-day fittings,
camouflage, underwater geometry, wreck locations or printability. Small details
may need fabrication-specific treatment. Check the source and print notes.

FILE IDENTIFICATION
https://operationtunnel.org/reconstruction/runtime/manifest.json
The manifest records exact URLs, byte sizes, SHA-256 hashes and source revisions.
https://operationtunnel.org/reconstruction/accuracy.json
https://operationtunnel.org/reconstruction/terrain-provenance.json

PINNED MODEL MASTERS
Limbourne R3:
https://github.com/jloops412/OperationTunnel/tree/d56806b4323f673b3306ba476825cead058afa21/models/hms-limbourne
Charybdis:
https://github.com/jloops412/OperationTunnel/tree/50d3a39c8a52bde92264e36820ed55de0ff585fe/models/charybdis

Read the relevant repository rights and fabrication notes before reuse.
Reference photographs retain their own rights; a model download grants no
additional rights in those photographs.