diff --git a/Mariner/MarinerPlugin.cs b/Mariner/MarinerPlugin.cs
index 6785015..71e05cc 100644
--- a/Mariner/MarinerPlugin.cs
+++ b/Mariner/MarinerPlugin.cs
@@ -1,4 +1,5 @@
-using System.Diagnostics.CodeAnalysis;
+using System;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using AutoRetainerAPI;
 using AutoRetainerAPI.Configuration;
@@ -6,6 +7,7 @@ using Dalamud.Game.Command;
 using Dalamud.Plugin;
 using Dalamud.Plugin.Services;
 using ECommons;
+using Lumina.Excel.GeneratedSheets;
 
 namespace Mariner;
 
@@ -18,14 +20,24 @@ public sealed class MarinerPlugin : IDalamudPlugin
     private readonly IPluginLog _pluginLog;
     private readonly AutoRetainerApi _autoRetainerApi;
 
+    private readonly int _maxRank;
+
     public MarinerPlugin(DalamudPluginInterface pluginInterface, IClientState clientState, IFramework framework,
-        ICommandManager commandManager, IChatGui chatGui, IPluginLog pluginLog)
+        ICommandManager commandManager, IChatGui chatGui, IPluginLog pluginLog, IDataManager dataManager)
     {
+        ArgumentNullException.ThrowIfNull(dataManager);
+
         _clientState = clientState;
         _framework = framework;
         _commandManager = commandManager;
         _pluginLog = pluginLog;
 
+        _maxRank = dataManager.GetExcelSheet<SubmarineRank>()!
+            .Where(x => x.RowId > 0 && x.Capacity > 0)
+            .Select(x => (int)x.RowId)
+            .Max();
+        _pluginLog.Information($"Max submersible rank: {_maxRank}");
+
         ECommonsMain.Init(pluginInterface, this);
         _autoRetainerApi = new AutoRetainerApi();
 
@@ -66,8 +78,8 @@ public sealed class MarinerPlugin : IDalamudPlugin
             return "Not updating subs, not all subs are enabled";
 
         if (offlineCharacterData.AdditionalSubmarineData.All(x =>
-                x.Value.Level >= 115 && x.Value.VesselBehavior == VesselBehavior.Use_plan))
-            return "Not updating subs, all subs are level 115+ and use plans";
+                x.Value.Level >= _maxRank && x.Value.VesselBehavior == VesselBehavior.Use_plan))
+            return $"Not updating subs, all subs are level {_maxRank}+ and use plans";
 
         var subs = offlineCharacterData.AdditionalSubmarineData.Values
             .OrderBy(x => x.Level)
@@ -76,13 +88,17 @@ public sealed class MarinerPlugin : IDalamudPlugin
         for (int i = 0; i < subs.Count; ++i)
         {
             var sub = subs[i];
-            sub.VesselBehavior = sub.Level switch
+            if (sub.Level >= _maxRank)
+                sub.VesselBehavior = VesselBehavior.Use_plan;
+            else
             {
-                < 101 => VesselBehavior.Unlock,
-                >= 115 => VesselBehavior.Use_plan,
-                _ when i == 0 => VesselBehavior.Unlock,
-                _ => VesselBehavior.Use_plan
-            };
+                sub.VesselBehavior = sub.Level switch
+                {
+                    < 101 => VesselBehavior.Unlock,
+                    _ when i == 0 => VesselBehavior.Unlock,
+                    _ => VesselBehavior.Use_plan
+                };
+            }
         }
 
         _autoRetainerApi.WriteOfflineCharacterData(offlineCharacterData);