diff --git a/modules/purchase_trade/lot.py b/modules/purchase_trade/lot.py
index 78c3cbf..550df35 100755
--- a/modules/purchase_trade/lot.py
+++ b/modules/purchase_trade/lot.py
@@ -3236,11 +3236,18 @@ class LotPlanTransport(Wizard):
         if not self.records:
             return {}
         lines = []
+        default_lotqt = None
+        default_unit = None
         for record in self.records:
             quantity = record.r_lot_quantity or record.r_lot_matched or 0
             if record.id < 10000000:
                 raise UserError(
                     "Only open quantity lines can be planned.")
+            if len(self.records) == 1:
+                default_lotqt = record.id - 10000000
+                default_unit = (
+                    record.r_lot_unit_line.id
+                    if record.r_lot_unit_line else None)
             lines.append({
                 'lotqt': record.id - 10000000,
                 'quantity': quantity,
@@ -3265,7 +3272,11 @@ class LotPlanTransport(Wizard):
                 'planned_to_date': record.r_planned_to_date,
                 'planned_note': record.r_planned_note,
                 })
-        return {'lines': lines}
+        return {
+            'default_lotqt': default_lotqt,
+            'default_unit': default_unit,
+            'lines': lines,
+            }
 
     def transition_planning(self):
         Lot = Pool().get('lot.lot')
@@ -3305,8 +3316,17 @@ class LotPlanTransportStart(ModelView):
     "Plan lot to transport"
     __name__ = "lot.plan_transport.start"
 
+    default_lotqt = fields.Many2One(
+        'lot.qt', "Default quantity line", readonly=True)
+    default_unit = fields.Many2One(
+        'product.uom', "Default unit", readonly=True)
     lines = fields.One2Many(
-        'lot.plan_transport.line', 'plan', "Planning lines")
+        'lot.plan_transport.line', 'plan', "Planning lines",
+        context={
+            'lot_plan_transport_default_lotqt': Eval('default_lotqt'),
+            'lot_plan_transport_default_unit': Eval('default_unit'),
+            },
+        depends=['default_lotqt', 'default_unit'])
 
 
 class LotPlanTransportLine(ModelView):
@@ -3341,6 +3361,16 @@ class LotPlanTransportLine(ModelView):
     def default_cancel_plan(cls):
         return False
 
+    @classmethod
+    def default_lotqt(cls):
+        return Transaction().context.get(
+            'lot_plan_transport_default_lotqt')
+
+    @classmethod
+    def default_unit(cls):
+        return Transaction().context.get(
+            'lot_plan_transport_default_unit')
+
 class QtWarning(UserWarning):
     pass
 
diff --git a/modules/purchase_trade/tests/test_module.py b/modules/purchase_trade/tests/test_module.py
index 587840e..78faab2 100644
--- a/modules/purchase_trade/tests/test_module.py
+++ b/modules/purchase_trade/tests/test_module.py
@@ -244,6 +244,44 @@ class PurchaseTradeTestCase(ModuleTestCase):
         self.assertEqual(values['lines'][1]['lotqt'], 2)
         self.assertEqual(values['lines'][1]['quantity'], Decimal('200'))
         self.assertFalse(values['lines'][1]['cancel_plan'])
+        self.assertIsNone(values['default_lotqt'])
+        self.assertIsNone(values['default_unit'])
+
+    def test_plan_transport_defaults_single_line_for_new_rows(self):
+        'plan transport wizard gives new rows the current quantity line'
+        wizard = lot_module.LotPlanTransport()
+        wizard.records = [
+            Mock(
+                id=10002242,
+                r_lot_quantity=Decimal('1000'),
+                r_lot_matched=Decimal('0'),
+                r_lot_unit_line=Mock(id=3),
+                r_planned_from_location=None,
+                r_planned_to_location=None,
+                r_planned_transport_type=None,
+                r_planned_from_date=None,
+                r_planned_to_date=None,
+                r_planned_note=None),
+        ]
+
+        values = wizard.default_plan(None)
+
+        self.assertEqual(values['default_lotqt'], 2242)
+        self.assertEqual(values['default_unit'], 3)
+
+    def test_plan_transport_line_defaults_from_context(self):
+        'new planning lines read their lot.qt and unit from the parent context'
+        context = {
+            'lot_plan_transport_default_lotqt': 2242,
+            'lot_plan_transport_default_unit': 3,
+            }
+        with patch.object(
+                lot_module, 'Transaction',
+                return_value=Mock(context=context)):
+            self.assertEqual(
+                lot_module.LotPlanTransportLine.default_lotqt(), 2242)
+            self.assertEqual(
+                lot_module.LotPlanTransportLine.default_unit(), 3)
 
     def test_plan_transport_applies_each_planning_line(self):
         'plan transport wizard applies each line independently'
diff --git a/modules/purchase_trade/view/lot_plan_transport_start_form.xml b/modules/purchase_trade/view/lot_plan_transport_start_form.xml
index fc5b850..817bdee 100644
--- a/modules/purchase_trade/view/lot_plan_transport_start_form.xml
+++ b/modules/purchase_trade/view/lot_plan_transport_start_form.xml
@@ -1,4 +1,6 @@
 <form col="4">
+    <field name="default_lotqt" invisible="1"/>
+    <field name="default_unit" invisible="1"/>
     <field name="lines" colspan="4" mode="tree"
         view_ids="purchase_trade.plan_transport_line_view_tree"/>
 </form>