Signature investment menu
cost 0/10 · weight 0/5
Score the baseline first: which bar is tallest, and which menu items touch that band?
Detection range Rdet = max band
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Threat detection range — baseline vs package (km)

Baseline This package Loudest band (Rdet)
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Rdet = max(RVHF, RX, RIR): how early you are found is set by the loudest band, so a package lowers Rdet only if it lowers the tallest bar. Radars follow R ∝ σ1/4 — it takes ~12 dB just to halve a range — so decibels spent off the limiter do not lower Rdet. IR intensity is two contributors, the skin (40 W/sr at every aspect) and the hot parts and plume; D cuts only the second and E only the first.
Aircraft heading
Heading0°
Each threat sees the aspect bearing(B-21→threat) − heading, wrapped 0–360°. The embedded 72-row pattern is interpolated at that aspect, the same selected package dB reductions are applied, and the threat's law turns it into a detection range. Ring is red if it holds a track, green if safe.
Package: baseline (no investments selected). Switch to the Trade-study tab to change it — the aspect view uses the same package.
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Top-down plan view — three threats at fixed bearings (km)

Threat holds a track Safe (outside detection ring) B-21 heading
This laydown is an illustration, not part of the tasking: the handout's Task 4 is simpler, with all three threats looking at the same aspect. Threats sit at fixed bearings (VHF 340°, X-band 20°, IR 180°), so the radars sit off the nose. Tab 1's VHF bar is the exact nose-on value (90 km at baseline); at the default heading (0°) the baseline VHF ring reads ≈ 91 km here.
Per-threat exposure at this heading
ThreatAspectSignatureRdet (km)Range (km)
Orientation is survivability. In this laydown the ingress heading (0°) turns the low-RCS nose to the two forward radars and the hot stern to the MANPADS behind; turning for egress swaps them. At baseline only a narrow band of headings (≈158–162°) slips every ring — and it costs you the ingress axis; a package that shrinks the rings widens that band.