diff --git a/src/core/configuration/Config.ts b/src/core/configuration/Config.ts
index 55fbab613..190b8595a 100644
--- a/src/core/configuration/Config.ts
+++ b/src/core/configuration/Config.ts
@@ -129,7 +129,7 @@ export interface Config {
   tradeShipGold(dist: number): Gold;
   tradeShipSpawnRate(
     tradeShipSpawnRejections: number,
-    numTradeShips: number,
+    numPlayerPorts: number,
   ): number;
   trainGold(rel: "self" | "team" | "ally" | "other"): Gold;
   trainSpawnRate(numPlayerFactories: number): number;
diff --git a/src/core/configuration/DefaultConfig.ts b/src/core/configuration/DefaultConfig.ts
index 8e1c5b776..2e1a871c8 100644
--- a/src/core/configuration/DefaultConfig.ts
+++ b/src/core/configuration/DefaultConfig.ts
@@ -298,27 +298,25 @@ export class DefaultConfig implements Config {
     return 120;
   }
 
-  tradeShipGold(dist: number, numPorts: number): Gold {
+  tradeShipGold(dist: number): Gold {
     return toInt(10000 + 150 * Math.pow(dist, 1.1));
   }
 
   // Probability of trade ship spawn = 1 / tradeShipSpawnRate
   tradeShipSpawnRate(
     tradeShipSpawnRejections: number,
-    numTradeShips: number,
+    numPlayerPorts: number,
   ): number {
     if (numPlayerPorts <= 3) return 18;
     if (numPlayerPorts <= 5) return 25;
     if (numPlayerPorts <= 8) return 35;
     if (numPlayerPorts <= 10) return 40;
     if (numPlayerPorts <= 12) return 45;
-    return 50;
-  }
 
     // Pity timer: increases spawn chance after consecutive rejections
     const rejectionModifier = 1 / (tradeShipSpawnRejections + 1);
 
-    return Math.floor((100 * rejectionModifier) / baseSpawnRate);
+    return Math.floor((100 * rejectionModifier) / 50);
   }
 
   unitInfo(type: UnitType): UnitInfo {
@@ -379,7 +377,6 @@ export class DefaultConfig implements Config {
       case UnitType.MIRV:
         return {
           cost: this.costWrapper(() => 35_000_000),
-          territoryBound: false,
         };
         break;
       case UnitType.MIRVWarhead:
diff --git a/src/core/execution/PortExecution.ts b/src/core/execution/PortExecution.ts
index 9483f1b70..d5c2e23f6 100644
--- a/src/core/execution/PortExecution.ts
+++ b/src/core/execution/PortExecution.ts
@@ -69,10 +69,10 @@ export class PortExecution implements Execution {
   }
 
   shouldSpawnTradeShip(): boolean {
-    const numTradeShips = this.mg.unitCount(UnitType.TradeShip);
+    const numPlayerPorts = this.port!.owner().unitCount(UnitType.Port);
     const spawnRate = this.mg
       .config()
-      .tradeShipSpawnRate(this.tradeShipSpawnRejections, numTradeShips);
+      .tradeShipSpawnRate(this.tradeShipSpawnRejections, numPlayerPorts);
     for (let i = 0; i < this.port!.level(); i++) {
       if (this.random.chance(spawnRate)) {
         this.tradeShipSpawnRejections = 0;