diff --git a/casr-logbook.cabal b/casr-logbook.cabal
--- a/casr-logbook.cabal
+++ b/casr-logbook.cabal
@@ -1,5 +1,5 @@
 name:               casr-logbook
-version:            0.6.5
+version:            0.6.6
 license:            OtherLicense
 license-file:       LICENSE
 author:             Tony Morris <ʇǝu˙sıɹɹoɯʇ@ןןǝʞsɐɥ>
diff --git a/changelog b/changelog
--- a/changelog
+++ b/changelog
@@ -1,3 +1,7 @@
+0.6.6
+
+* Semigroup/Monoid for AircraftFlightMeta
+
 0.6.5
 
 * Fix bug in RA/GA instructing.
diff --git a/src/Data/Aviation/Casr/Logbook/Meta/AircraftFlightMeta.hs b/src/Data/Aviation/Casr/Logbook/Meta/AircraftFlightMeta.hs
--- a/src/Data/Aviation/Casr/Logbook/Meta/AircraftFlightMeta.hs
+++ b/src/Data/Aviation/Casr/Logbook/Meta/AircraftFlightMeta.hs
@@ -15,6 +15,8 @@
 import Data.Eq(Eq)
 import Data.Ord(Ord)
 import Prelude(Show)
+import Data.Monoid
+import Data.Semigroup
 
 data AircraftFlightMeta =
   AircraftFlightMeta {
@@ -27,3 +29,11 @@
   } deriving (Eq, Ord, Show)
 
 makeClassy '' AircraftFlightMeta
+
+instance Semigroup AircraftFlightMeta where
+  AircraftFlightMeta t1 s1 i1 v1 e1 p1 <> AircraftFlightMeta t2 s2 i2 v2 e2 p2 =
+    AircraftFlightMeta (t1 <> t2) (s1 <> s2) (i1 <> i2) (v1 <> v2) (e1 <> e2) (p1 <> p2)
+
+instance Monoid AircraftFlightMeta where
+  mempty =
+    AircraftFlightMeta mempty mempty mempty mempty mempty mempty