diff --git a/ovs_hub_ref/v1/OVS_HUB_REF_v1.0.0.yaml b/ovs_hub_ref/v1/OVS_HUB_REF_v1.0.0.yaml
index f5e7c057..b8f65da9 100644
--- a/ovs_hub_ref/v1/OVS_HUB_REF_v1.0.0.yaml
+++ b/ovs_hub_ref/v1/OVS_HUB_REF_v1.0.0.yaml
@@ -299,6 +299,16 @@ paths:
             type: string
             maxLength: 10
             example: EMC
+        - name: vesselIMONumber
+          in: query
+          description: |
+            The identifier of a vessel via the `vesselIMONumber`. The result will only return partner voyages including the `vesselIMONumber`.
+          schema:
+            type: string
+            pattern: ^\d{7,8}$
+            minLength: 7
+            maxLength: 8
+            example: '9321483'
       responses:
         '200':
           description: OK