diff --git a/ogn/collect/celery.py b/ogn/collect/celery.py
index bc89364..dd8f289 100644
--- a/ogn/collect/celery.py
+++ b/ogn/collect/celery.py
@@ -9,7 +9,7 @@ from celery.signals import worker_init, worker_shutdown
 app = Celery('ogn.collect',
              broker='redis://localhost:6379/0',
              backend='redis://localhost:6379/0',
-             include=["ogn.collect.fetchddb"])
+             include=["ogn.collect.fetchddb", "ogn.collect.logbook"])
 
 DB_URI = 'sqlite:///beacons.db'
 
diff --git a/ogn/commands/logbook.py b/ogn/commands/logbook.py
index 7b2484a..116409c 100644
--- a/ogn/commands/logbook.py
+++ b/ogn/commands/logbook.py
@@ -9,11 +9,19 @@ from sqlalchemy.sql.expression import true, false, label
 from ogn.model import Device, TakeoffLanding
 
 from ogn.commands.dbutils import session
+from ogn.collect.logbook import compute_takeoff_and_landing
 
 from manager import Manager
 manager = Manager()
 
 
+@manager.command
+def compute():
+    """Compute takeoffs and landings."""
+    print("Compute takeoffs and landings...")
+    compute_takeoff_and_landing.delay()
+
+
 @manager.command
 def show(airport_name, latitude, longitude, altitude):
     """Show a logbook for <airport_name> located at given position."""