Move icons back into SIG data

core/sig_lookup_helper.py

@@ -78,6 +78,10 @@ def get_sig_ref_info(sig, ref_id):
                 sig_ref.url = f"https://www.beachesontheair.com/beaches/{sig_ref.name.lower().replace(' ', '-')}"
             return sig_ref
 
+        elif sig.upper() == "BIWOTA":
+            # For BIWOTA there are no references, all we can set is a type
+            sig_ref.ref_type = "Waterway"
+
         elif sig.upper() == "GMA Islands":
             # GMA Islands is a bit of a mess of GMA and IOTA references. Try looking them both up and see what returns
             # the best result.