FA-69253 / Tide and marine navigation tables / Member archive

Light characteristic abbreviation: Lights without a colour letter get an empty colour · case 03

White lights are reported with no colour.

Member previewVariant 3 · 3 implementations · 7 checks per implementation

Case contract

Input a chart light abbreviation such as "Fl(3)WR.10s15m20M". Return [class, groups, colours, period_s, height_m, range_nm]: class includes an "Al." prefix; groups is a list (composite "2+1" -> [2,1], default [1]); colours default "W"; missing numbers are None. Unparseable strings return None.

Why this case matters

Tide tables and passage plans turn published predictions into go/no-go decisions about depth, clearance and timing.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
light characteristic abbreviation "VQ(6)10s"	`["VQ", [6], "", 10.0, null, null]`	`["VQ", [6], "W", 10.0, null, null]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.