diff --git a/ontology/saref4mari.ttl b/ontology/saref4mari.ttl
index 2efb431c9ecc98a88df82f6c1887a0e486e4f091..eb2a0219bcdfd280bb078d84fbd7aef8b894c357 100644
--- a/ontology/saref4mari.ttl
+++ b/ontology/saref4mari.ttl
@@ -2212,7 +2212,7 @@ s4mari:TidalCurrentSpeed rdf:type owl:NamedIndividual ,
 
 ###  https://saref.etsi.org/saref4mari/TideLevel
 s4mari:TideLevel rdf:type owl:NamedIndividual ,
-                          saref:Property ,
+                          s4mari:MeteoOceanoConditionProperty ,
                           [ rdf:type owl:Restriction ;
                             owl:onProperty saref:isMeasuredIn ;
                             owl:hasValue <http://www.ontology-of-units-of-measure.org/resource/om-2/metre>
@@ -2229,7 +2229,7 @@ s4mari:TideLevel rdf:type owl:NamedIndividual ,
 
 ###  https://saref.etsi.org/saref4mari/TidePressure
 s4mari:TidePressure rdf:type owl:NamedIndividual ,
-                             saref:Property ,
+                             s4mari:MeteoOceanoConditionProperty ,
                              [ rdf:type owl:Restriction ;
                                owl:onProperty saref:isMeasuredIn ;
                                owl:hasValue <http://qudt.org/vocab/unit/KiloPA>
@@ -2314,7 +2314,7 @@ s4mari:UUV rdf:type owl:NamedIndividual ,
 
 ###  https://saref.etsi.org/saref4mari/UnderwaterPressure
 s4mari:UnderwaterPressure rdf:type owl:NamedIndividual ,
-                                   saref:Property ,
+                                   s4mari:MeteoOceanoConditionProperty ,
                                    [ rdf:type owl:Restriction ;
                                      owl:onProperty saref:isMeasuredIn ;
                                      owl:hasValue <http://qudt.org/vocab/unit/KiloPA>
@@ -2336,7 +2336,7 @@ s4mari:UnderwaterPressure rdf:type owl:NamedIndividual ,
 
 ###  https://saref.etsi.org/saref4mari/UnderwaterSoundVelocity
 s4mari:UnderwaterSoundVelocity rdf:type owl:NamedIndividual ,
-                                        saref:Property ,
+                                        s4mari:MeteoOceanoConditionProperty ,
                                         [ rdf:type owl:Restriction ;
                                           owl:onProperty saref:isMeasuredIn ;
                                           owl:hasValue <http://qudt.org/vocab/unit/M-PER-SEC>
@@ -2401,7 +2401,7 @@ s4mari:VoyageLeg rdf:type owl:NamedIndividual ,
 
 ###  https://saref.etsi.org/saref4mari/WaterConductance
 s4mari:WaterConductance rdf:type owl:NamedIndividual ,
-                                 saref:Property ,
+                                 s4mari:MeteoOceanoConditionProperty ,
                                  [ rdf:type owl:Restriction ;
                                    owl:onProperty saref:isMeasuredIn ;
                                    owl:hasValue <http://qudt.org/vocab/unit/MilliS>
@@ -2423,7 +2423,7 @@ s4mari:WaterConductance rdf:type owl:NamedIndividual ,
 
 ###  https://saref.etsi.org/saref4mari/WaterConductivity
 s4mari:WaterConductivity rdf:type owl:NamedIndividual ,
-                                  saref:Property ,
+                                  s4mari:MeteoOceanoConditionProperty ,
                                   [ rdf:type owl:Restriction ;
                                     owl:onProperty saref:isMeasuredIn ;
                                     owl:hasValue <http://qudt.org/vocab/unit/S-PER-M>
@@ -2445,7 +2445,7 @@ s4mari:WaterConductivity rdf:type owl:NamedIndividual ,
 
 ###  https://saref.etsi.org/saref4mari/WaterTemperature
 s4mari:WaterTemperature rdf:type owl:NamedIndividual ,
-                                 saref:Property ,
+                                 s4mari:MeteoOceanoConditionProperty ,
                                  [ rdf:type owl:Class ;
                                    owl:unionOf ( [ rdf:type owl:Restriction ;
                                                    owl:onProperty saref:isMeasuredIn ;
@@ -2474,7 +2474,7 @@ s4mari:WaterTemperature rdf:type owl:NamedIndividual ,
 
 ###  https://saref.etsi.org/saref4mari/WaterTurbidity
 s4mari:WaterTurbidity rdf:type owl:NamedIndividual ,
-                               saref:Property ,
+                               s4mari:MeteoOceanoConditionProperty ,
                                [ rdf:type owl:Restriction ;
                                  owl:onProperty saref:isMeasuredIn ;
                                  owl:hasValue <http://qudt.org/vocab/quantitykind/Turbidity>