// SIDE-VIEW — TOW ARRAY SURVEY
IDLE — CLICK SEAFLOOR TO PLACE OBJECTS
0.0
nT
SENSOR A — FWD
0.0
nT
SENSOR B — AFT
0.0
nT
SENSOR C — VERT
◈ MUNITION LIKELIHOOD SCORE
--
AWAITING DETECTION
◈ LED ALERT PANEL
GREEN — PROBABLE DEBRIS
0–25
AMBER LOW — UNCERTAIN
26–50
AMBER HIGH — PROBABLE EO
51–75
RED LOW — HIGH CONFIDENCE
76–90
RED HIGH — IMMEDIATE ACTION
91–100
◈ PLACE OBJECT ON SEAFLOOR
◈ SURVEY CONTROL
DETECTION LOG
No detections yet
// REAL-TIME TRI-AXIS MAGNETOMETER WAVEFORMS
SENSOR A — FORWARD HORIZONTAL0.0 nT
SENSOR B — AFT HORIZONTAL0.0 nT
SENSOR C — VERTICAL0.0 nT
HORIZONTAL GRADIENT (B−A)0.0 nT/m
// VERTICAL GRADIENT (C − MID)
VERTICAL GRADIENT — SHAPE INDICATOR0.0 nT/m
// GRADIENT PHYSICS — HOW IT WORKS
HORIZONTAL GRADIENT (B−A)Measures the rate of change of the magnetic field horizontally across the 1.5m baseline. Detects ferrous object presence and gives an estimate of mass. Compact objects produce a sharp, symmetric peak.
VERTICAL GRADIENT (C−MID)Measures the vertical component of the field gradient. High V/H ratio indicates a compact, cylindrical or spherical object — consistent with munition geometry. Low ratio indicates flat, spread objects — consistent with debris.
TENSOR SIGNATUREThe combined three-dimensional fingerprint. Explosive ordnance (cylinders, spheres) produce recognizably different tensor signatures from irregular debris (engine blocks, wire). The MLS algorithm uses all three axes simultaneously.
// ANOMALY CURVE — SIGNATURE AS ARRAY PASSES OVER OBJECT
SIGNATURE CURVE — BELL CURVE = MUNITION / ASYMMETRIC = DEBRISAWAITING DATA
HORIZ. GRADIENT MAGNITUDE
0.00
VERT/HORIZ RATIO (SHAPE)
0.00
CURVE SYMMETRY SCORE
0.00
// MLS COMPUTATION
// Horizontal gradient magnitude (presence + mass proxy)
HGM = |B − A| / baseline_distance
// Vertical-to-horizontal ratio (shape indicator) VHR = |C − mid(A,B)| / HGM
// Anomaly curve symmetry (compact = 1.0, irregular = 0.0) SYM = 1 − normalized_asymmetry_index
// Munition Likelihood Score MLS = 0.35 × clamp(HGM/50, 0, 1) × 100
+ 0.40 × clamp(VHR/2.5, 0, 1) × 100
+ 0.25 × SYM × 100
// Result: 0–100 | ≥51 = probable EO | ≥76 = mark + report
// Vertical-to-horizontal ratio (shape indicator) VHR = |C − mid(A,B)| / HGM
// Anomaly curve symmetry (compact = 1.0, irregular = 0.0) SYM = 1 − normalized_asymmetry_index
// Munition Likelihood Score MLS = 0.35 × clamp(HGM/50, 0, 1) × 100
+ 0.40 × clamp(VHR/2.5, 0, 1) × 100
+ 0.25 × SYM × 100
// Result: 0–100 | ≥51 = probable EO | ≥76 = mark + report
// MLS INTERPRETATION TABLE
| MLS RANGE | INTERPRETATION | LED | ACTION |
|---|---|---|---|
| 0–25 | Probable debris | GREEN | Log & continue |
| 26–50 | Uncertain | AMBER LOW | Log, note, resurvey |
| 51–75 | Probable EO | AMBER HIGH | Mark GPS, 50m caution |
| 76–90 | High confidence EO | RED LOW | Mark, 100m exclusion |
| 91–100 | Immediate action | RED HIGH | Mark + report NOW |
// OBJECT TYPE SIGNATURES
| OBJECT | MASS | VHR | SYM | MLS |
|---|---|---|---|---|
| 81mm Mortar | 3 kg | High | 0.88 | 82–95 |
| Artillery Shell | 5 kg | High | 0.85 | 78–90 |
| Naval Mine | 80 kg | Med-High | 0.90 | 75–88 |
| Engine Block | 150 kg | Low | 0.25 | 10–25 |
| Vehicle Parts | 50 kg | Low | 0.18 | 12–28 |
| Wire/Debris | 10 kg | Very Low | 0.10 | 5–18 |
// CLASSIFICATION PERFORMANCE
DISCRIMINATION ESTIMATE: 70–80% correct classification
FALSE POSITIVE RATE: 5–10% of high-MLS alerts (debris-rich)
BASIS: Tensor gradient physics + literature precedent
⚠ REQUIRES PROTOTYPE CALIBRATION — estimates, not tested results
// GPS-TAGGED DETECTION MAP — COMMUNITY RISK OVERLAY
SURVEY AREA — SOLOMON ISLANDS PILOT ZONE±3m GPS accuracy
// DETECTION LOG — FULL RECORD
No detections logged yet. Run a survey to populate.
◈ TOWED ARRAY
| Frame Length | 2.0 m PVC |
| Operating Depth | 1–2 m |
| Tow Distance | 10–15 m aft |
| Magnetometers | 3× Fluxgate |
| Baseline A-B | 1.5 m |
| C Offset | +0.5 m vertical |
| Depth Sensor | MS5837-30BA |
| Max Depth Rated | 50 m |
| Detection Range | 5–30 m depth |
◈ DETECTION PERFORMANCE
| Min Detectable EO | 81mm mortar (3kg) |
| GPS Accuracy | ±3 m (u-blox NEO-M8N) |
| MLS Discrimination | ~70–80% [?] |
| False Positive Rate | ~5–10% [?] |
| Survey Speed | 2–3 knots |
| Line Spacing (25m) | 5 m |
| Line Spacing (30m) | 3 m |
◈ SURFACE UNIT
| Compute | Raspberry Pi 4 (4GB) |
| GPS | u-blox NEO-M8N |
| Battery | 12V 20Ah LiFePO4 |
| Solar Input | 50W controller |
| Runtime | 7–8 hours |
| Solar Recharge | 6–8 hours |
| Connectivity | Bluetooth HC-05 |
| Export Formats | KML + GPX |
BATTERY
SOLAR CHARGING — 38W INPUT
◈ CAPEX BREAKDOWN — $4,650
| Fluxgate Magnetometers ×3 | $2,100 |
| Tow Frame + Hardware | $100 |
| Raspberry Pi 4 + Case | $180 |
| Battery LiFePO4 | $180 |
| Tow Cable + Connectors | $250 |
| App Development | $900 |
| MLS Pattern Library | $200 |
| Assembly + Calibration | $550 |
| Contingency (10%) | $350 |
| TOTAL | $4,650 |
◈ COMPONENT STATUS
Magnetometer A (FWD)NOMINAL
Magnetometer B (AFT)NOMINAL
Magnetometer C (VERT)NOMINAL
3-Axis Alignment (±5nT)PASS
GPS LockACQUIRED
Depth SensorNOMINAL
Tow Cable IntegrityNOMINAL
MLS Pattern LibraryLOADED
Bluetooth LinkCONNECTED
Solar ControllerCHARGING
◈ SAFETY PROPERTIES
✓ ZERO EM EMISSION — passive fluxgate only
✓ ZERO ACOUSTIC OUTPUT — no sonar, no pulses
✓ ZERO DETONATION RISK — physics, not policy
✓ NO DIVER EXPOSURE — full boat-surface operation
✓ 10–15m STANDOFF — tow array keeps operators clear
✓ RoHS COMPLIANT — no toxic components
✓ SOLAR POWERED — no fuel, no emissions
RED TEAM — ORION PHYSICS SIMULATOR
All findings documented. All resolutions logged. Unresolved items explicitly declared.
0CRITICAL
1MAJOR
2MODERATE
4MINOR
7PASSED
RT-001
MAJOR
MLS discrimination rate (70–80%) is an estimate, not a tested result
The simulator displays MLS scores based on physics-derived tensor gradient calculations. The 70–80% correct classification rate cited in the ORION proposal is based on published marine survey literature and tensor gradient physics for known munition geometries — it is not a result from testing against real ordnance. The simulator faithfully represents this uncertainty. All classification outputs are tagged as estimated performance pending prototype calibration.
All MLS outputs in this simulator are derived from physics models, not calibrated field data. The System tab explicitly marks discrimination estimates with [?]. The MLS Engine tab states: "REQUIRES PROTOTYPE CALIBRATION — estimates, not tested results." This is not a simulator error — it is an honest representation of the current state of the ORION proposal.
RT-002
MODERATE
MLS formula coefficients (0.35/0.40/0.25) are unvalidated — require FCL calibration
The MLS computation weights horizontal gradient magnitude (35%), vertical-to-horizontal ratio (40%), and curve symmetry (25%). These weights were designed based on the physics of munition vs. debris discrimination, but have not been validated against a calibration dataset. Different field environments (varying sediment, salinity, background field) may require adjusted weights.
Weights displayed explicitly in the MLS Engine formula block. The formula is transparent and modifiable. Prototype calibration against steel test cylinders of known dimensions (ORION Phase 1, Months 1–3) will produce the validated coefficient set. This simulator uses the initial physics-derived weights and labels them as such.
RT-003
MODERATE
Dipole field model assumes simplified geometry — real seafloor has complex background fields
The simulator models magnetometer response using a magnetic dipole approximation: field strength ∝ mass/distance³. Real marine environments include diurnal variation, vessel interference, geological anomalies, and corrosion-induced field changes in degraded munitions. The simulator does not model these noise sources.
The survey canvas includes a baseline field noise simulation (±2nT random variation). This is representative but not physically calibrated. A note is displayed in the gradiometer tab explaining the simplified model. Real deployments require a baseline survey pass before operational surveys to establish local field characteristics.
RT-004
MINOR
GPS coordinate display uses simulated relative positions, not actual WGS84 coordinates
The detection map tab displays GPS coordinates in a pixel-relative format scaled to represent the simulation area. These are not real geographic coordinates. The KML/GPX export generates placeholder coordinates centered on the Solomon Islands (approximately 9°S, 160°E) for demonstration purposes.
Detection map and export labels state "SIMULATION — coordinates for demonstration only." Real ORION deployment uses u-blox NEO-M8N hardware GPS (±3m accuracy). Export format is correct KML/GPX structure — only the coordinate values are simulated.
RT-005
MINOR
Boat speed display shows knots but simulation runs in pixel velocity — unit mismatch in physics
The speed slider displays values in knots (1–5 kts) to match operational specifications. The survey canvas physics runs in pixels/frame. The conversion is not physically calibrated to real meters — a "2.5 knot" simulation does not represent the exact time a real array would spend over an object at that speed.
The simulator is a qualitative physics demonstration, not a quantitative time-domain model. Speed affects the MLS signature curve width (slower = more data points over an object = better signature resolution). This behavior is correctly implemented. The unit label clarifies the display value is for reference, not exact physical equivalence.
RT-006
MINOR
Multiple overlapping objects produce additive field — simulator handles superposition but does not warn operator
When two objects are placed close together, their magnetic fields superimpose. The simulator computes combined field correctly using linear superposition. However, the MLS score for overlapping objects may be anomalously high or low depending on field cancellation or reinforcement — a behavior that should be flagged to operators.
Added visual indicator in the detection log when adjacent objects are within 3m of each other: "POSSIBLE MULTI-SOURCE OVERLAP — resurvey recommended." The ORION proposal resurvey protocol (return pass on all Amber-Low detections) handles this operationally.
RT-007
MINOR
Curve symmetry calculation edge case — very fast survey speed produces too few samples for reliable symmetry scoring
At maximum speed (5 knots simulation), the array passes over a small object in fewer canvas frames, producing a signature curve with insufficient sample points for reliable symmetry calculation. Below ~8 samples per pass, the symmetry score becomes unreliable.
Guard added: if sample count during a pass drops below 8, symmetry score is set to 0.5 (neutral) and the MLS display shows "SYM: LOW CONFIDENCE" alongside the score. This matches real-world practice where slower survey speeds produce better classification accuracy — consistent with ORION's 2–3 knot operational specification.
✓ PASS — RT-001 through RT-007 DOCUMENTED. No undisclosed issues. Simulation is a faithful physics representation of the ORION proposal with honest uncertainty labeling throughout. All estimates that require prototype calibration are explicitly tagged. The simulator is suitable for UNDP proposal demonstration purposes — it illustrates the detection and classification methodology without overclaiming validated performance.