diff --git a/modules/stock/vessel.py b/modules/stock/vessel.py
index 4a5fc0c..cc559e1 100755
--- a/modules/stock/vessel.py
+++ b/modules/stock/vessel.py
@@ -52,6 +52,10 @@ class Vessel(
     vessel_info = fields.Function(fields.Text("Position"),'get_info')
     image = fields.Binary("Vessel position",readonly=True)
     
+    @classmethod
+    def default_vessel_imo(cls):
+        return '9900459'
+    
     def get_info(self,name=None):        
         hdr = {
             'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.64 Safari/537.11',
@@ -60,6 +64,8 @@ class Vessel(
             'Accept-Encoding': 'none',
             'Accept-Language': 'en-US,en;q=0.8',
             'Connection': 'keep-alive'}
+        if not self.vessel_imo:
+            return
         url = r'https://www.vesselfinder.com/en/vessels/VOS-TRAVELLER-IMO-' + self.vessel_imo
         req = urllib.request.Request(url, None, hdr)
         try: