Yoshimitsu Systems
A brass-handled YS·NAV 7 navigation console in a dark control room, its star chart tracing a dotted amber route past Tau Ceti and Epsilon Eridani to the Ficus Sector, with a window over Kyoto at night behind it
YS·NAV · Navigation Systems

A fix you can keep for forty years.

YS·NAV 7 does stellar cartography and course-keeping for sublight and colony craft crossing uncharted sectors. Every console is assembled and calibrated in Kyoto, then trusted to hold its fix for the whole crossing.

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01 · Specification

Course-keeping, not just course-plotting.

Plotting a route is the easy part. Holding it for decades, with no relay to correct you and no second chance at a fix, is the work YS·NAV is built for.

Two numbers matter. A live fix from the two nearest reference stars puts the ship within a hundredth of an astronomical unit. The figure we sign for is the course hold: ±0.02 light-years, guaranteed for the whole crossing, through decades of catalogue drift and with a camera offline. Our engineering note on navigating by parallax shows the physics behind both.

The chart runs on a 4077 core and logs its history to a memory lattice, so a crew can see where the ship has been as well as where it is going.

YS·NAV — DATASHEET EXTRACT
ModelYS·NAV 7
RangeInterstellar
Position fix±0.01 au live · two nearest stars
Course hold±0.02 ly guaranteed · whole crossing
HeadingBearing + mark e.g. 247.6 mk 12
CraftSublight · colony
ComputeYS·CORE 4077
Course logYS·LATTICE
Calibration7-point star simulator · Kyoto
Reference unit · SS Mariposa · ETA 41 yr 118 d · status nominal
02 · Calibration

Seven checks before it ships.

A technician in white gloves turns a brass alignment knob on a YS·NAV 7 console mounted on a granite test table, its side panel open on neat cable looms and modules; the screen locks crosshairs on a reference star and reads CAL 7/7 OK · FIX ±0.02 LY, while a black YS star simulator aims a single point of light into the console. A foam-lined case stencilled YS·NAV 7 · Kyoto waits open beside the bench, beneath a 良光 Yoshimitsu Systems sign and a window over Kyoto at night with a lit pagoda
YS·NAV 7 — CALIBRATION BENCH · KYOTO

Locked on a star that isn't there

Every console is calibrated on a granite table against a star simulator, a collimator that shows the star tracker a single point of light at infinity. Seven checks, adjusted by hand, and the console doesn't go into its case until all seven pass. The ±0.02 ly on its screen is the course hold, the whole-crossing guarantee; a live fix is far tighter.

CAL 7/7 OKHOLD ±0.02 lySIM SS-1000
03 · One architecture

The rest of the system.

YS·CORE

Compute Cores

The Model 4077 that computes every course YS·NAV holds.

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YS·LATTICE

Memory Lattices

Where the course log is kept, readable for two hundred years.

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YS·BRIDGE

LCARS Interface

The panels a crew uses to read the chart and act on it.

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