As the winter drew near this was a source of constant anxiety, since so many of the vessels outward bound were in ballast (empty), and their speed was consequently quickly reduced in bad weather.

The ships under these conditions became in some cases almost unmanageable in a convoy, and the responsibilities of the escorts were much intensified.
In September, 1917, the following was the position in respect to outward bound convoys: Port of Assembly.

Frequency of Sailing.

Destination.
Lamlash Every 4 days.

Atlantic ports.
Milford Haven Every 4 days.