diff --git a/README.md b/README.md
index 12b7850..f4bd2e0 100644
--- a/README.md
+++ b/README.md
@@ -68,7 +68,10 @@ their own galaxy, dealt off the same seed.
 
 One board, shared by everybody. Ending a session posts every captain in the
 party, and the top 50 comes back ranked best first: raiders destroyed, then
-days left on the orders, then torpedoes still in the racks.
+whole days left on the orders, then torpedoes still in the racks. Days are
+whole on the board and shown to a tenth in the game — the service's ranked
+columns are integers, and a tie-break finer than a day would be measuring
+the dice rather than the captain.
 
 There is no way to clear it. A captain leaves the list only by being pushed
 off the bottom by a better one.
diff --git a/src/App.tsx b/src/App.tsx
index ecf480e..3ea8c06 100644
--- a/src/App.tsx
+++ b/src/App.tsx
@@ -185,7 +185,8 @@ export default function App() {
       captains.map((c) => ({
         name: c.name,
         killed: c.killed,
-        daysLeft: c.daysLeft,
+        // Whole days: the board's ranked columns are integers.
+        daysLeft: Math.floor(c.daysLeft),
         torpedoes: c.torpedoes,
         ending: c.outcome,
       })),
diff --git a/src/components/screens.tsx b/src/components/screens.tsx
index 5a5c4a0..245333d 100644
--- a/src/components/screens.tsx
+++ b/src/components/screens.tsx
@@ -309,7 +309,8 @@ export function HighScoreScreen({
   return (
     <div className="stack board">
       <Line className="accent">THE BOARD</Line>
-      <Line className="dim">RANKED ON RAIDERS DESTROYED, THEN DAYS LEFT, THEN TORPEDOES.</Line>
+      <Line className="dim">RANKED ON RAIDERS DESTROYED, THEN WHOLE DAYS LEFT, THEN
+        TORPEDOES.</Line>
       <Line> </Line>
       {state === 'loading' && <Line>ASKING THE MACHINE...</Line>}
       {state === 'error' && (
@@ -326,7 +327,7 @@ export function HighScoreScreen({
         scores.map((s, i) => (
           <Line key={s.id} className={highlight.includes(s.id) ? 'accent' : ''}>
             {String(i + 1).padStart(2)}. {s.name.padEnd(MAX_NAME)}{' '}
-            {String(s.killed).padStart(2)} {s.daysLeft.toFixed(1).padStart(5)}{' '}
+            {String(s.killed).padStart(2)} {String(s.daysLeft).padStart(3)}{' '}
             {String(s.torpedoes).padStart(2)}
           </Line>
         ))}
diff --git a/src/game/highscores.ts b/src/game/highscores.ts
index 67171df..4170019 100644
--- a/src/game/highscores.ts
+++ b/src/game/highscores.ts
@@ -24,7 +24,13 @@ export interface Score {
   name: string
   /** Raiders destroyed. The rank, before any tie-break. */
   killed: number
-  /** Days still on the orders when the patrol ended. */
+  /**
+   * Whole days still on the orders when the patrol ended.
+   *
+   * The game counts days to a tenth and the board ranks on integers, so this
+   * is the floor of what the report screen shows. A tie-break finer than a
+   * day would be measuring the dice rather than the captain.
+   */
   daysLeft: number
   /** Torpedoes still in the racks. */
   torpedoes: number