diff --git a/parsers/survex.py b/parsers/survex.py
index 031d9e0..b9c26ca 100644
--- a/parsers/survex.py
+++ b/parsers/survex.py
@@ -843,26 +843,16 @@ class LoadingSurvex:
 
     def get_expo_from_year(self, year, line, survexblock):
         # cacheing to save DB query on every block
-        if year in self.expos:
-            expo = self.expos[year]
+        # Minimize ORM calls: cache all expeditions by year on first use
+        if not hasattr(self, '_expedition_cache'):
+            self._expedition_cache = {e.year: e for e in Expedition.objects.all()}
+        if year in self._expedition_cache:
+            expo = self._expedition_cache[year]
         else:
-            expeditions = Expedition.objects.filter(year=year)
-            if len(expeditions) > 1:
-                message = (
-                    f"! More than one expedition in year {year} '{line}' ({survexblock}) {survexblock.survexfile.path}"
-                )
-                print(self.insp + message)
-                stash_data_issue(
-                    parser="survex", message=message, url=None, sb=(survexblock.survexfile.path)
-                )
-            if expeditions:
-                expo = expeditions[0]
-                self.expos[year] = expo
-            else:
-                expo = Expedition.objects.get(year="1976")
-                message = f"! DATE INCORRECT. There is no expedition for the year {year}. {survexblock.survexfile.path} ({survexblock}) - set to 1976."
-                print(self.insp + message)
-                stash_data_issue(parser='survex', message=message, url=None, sb=(survexblock.survexfile.path))
+            message = f"! DATE INCORRECT. There is no expedition for the year {year}. {survexblock.survexfile.path} ({survexblock}) - set to 1976."
+            print(self.insp + message)
+            stash_data_issue(parser='survex', message=message, url=None, sb=(survexblock.survexfile.path))
+            expo = self._expedition_cache.get("1976")
         return expo
                           
     def LoadSurvexDate(self, survexblock, line):