▮ Plasma Gases

Gas emitting directly. No phosphor in the stack.

Plasma gases
▯ CRT Phosphors

A beam on a phosphor, which emits and then persists.

CRT phosphors

General purpose · built to be read

Specialized · built for an instrument

Switches

Simulation · never a color

Style & engine · never the hardware

Running · what CSS cannot do
  • Ghosting — rewritten text leaves its old value to decay
  • Scroll smear — the image trails while the page moves
  • Framebuffer decay — the old screen drains behind the new
State
Technology
PLASMA
Emitter
NEON
Emission
585.2 nm
Mode
PRESET
Engine
CSS + JS
Technology

A beam sweeps a phosphor coating, which emits while struck and then persists. The color belongs to the phosphor, not the beam; the P-number names the compound.

The radar phosphor, and it went onto scope tubes for a reason: the flash gives position and the trail gives history. Two coatings, not one. The beam writes into a blue ZnS:Ag layer that decays in microseconds, and that layer's own photons pump a yellow-green one behind it which holds for seconds. So the ink is blue and the halo is green: text you are reading is being re-struck sixty times a second, and text that stops being written leaves only the glow.

A preset sets the display and its simulation. Everything stays adjustable — and Reset puts all of it back, switches, styles and engine alike.
SEASCAN

RM-12 · 3 NM · HEAD-UP

Plan Position Indicator
000030060 090120150 180210240 270300330
0 Bearing 073.5° 3 NM
Transmitter
TRANSMIT
Pulse Short · 80 ns
Own Ship
Heading
047.5°T
Course
049°T
Speed
12.4 KN
Log
11.8 KN
Decca 5B
R 12.34 G 45.67
Fix
51°57.2'N 004°06.8'E
Markers
EBL 073.5°
VRM 1.62 NM
Range

Ring interval follows the scale.

Range scale
Receiver
Gain62%
A/C Sea30%
A/C Rain12%
Tune84%
Trails
Pulse
Target Plot
TrkVesselBrgRng CseSpd CPATCPAState
T1Coaster041°1.86 218°9.2 0.407:10Tracked
T2Tanker105°1.32 064°6.1 1.112:40Tracked
T3Ferry168°2.25 341°17.5 0.905:55Tracked
T4Fishing214°0.90 —1.4 0.9—Acquiring
HEAD-UP RELATIVE MOTION TRAILS 3 MIN IR ON ANT 24 RPM UTC 00:00:00