Why submarine deliveries could not sustain the garrison

Japanese submarines made repeated night runs with food supplies, but the deliveries arrived near the airfield rather than where the troops needed them. Sixteen submarines supported roughly twenty runs over three weeks, often landing twenty to thirty tons in a night. Supplies then had to be man-packed through jungle, and much of the food spoiled or failed to reach forward units. The segment is a clear example of delivery capacity being different from usable logistical support.