Radio communication between Majon-ni and Wonsan was so uncertain, because of the intervening hill mass, that it was possible to get through for only a few hours at night. The surest means of communication was a written message carried by helicopter or OY pilots, who had to insure delivery to regiment after landing at the Wonsan airfield.[173] [173] Col T. L. Ridge, ltr, 28 Nov 55; R. A. Doyle Comments. The supply problem had already begun to pinch before the first week ended. A convoy came through from Wonsan without molestation on 29 October, but it was the last for a week. On 1 November, just to play safe, Lieutenant Colonel Ridge requested a practice air drop which went off satisfactorily. His judgment was upheld on the morning of the How Company ambush when a 3/1 supply convoy was attacked seven miles west of Wonsan (see Map 5) and forced to turn back. First Lieutenant James D. Beeler commanded the George Company rifle platoon escorting the column of supply vehicles which was under the charge of Second Lieutenant James L. Crutchfield of H&S Company. The third truck in line, loaded with diesel fuel and C-3 composition,[174] burst into flames after running into a hail of enemy rifle and automatic weapons bullets. Meanwhile the first two trucks continued until they came to a roadblock created by blowing a crater. Turning around under intense fire, they got back to the point of original ambush just as the other vehicles were trying to reverse direction; and in the confusion two trucks went off the narrow road, making a total of three lost. [174] C-3 composition is a powerful, putty-like explosive used chiefly by military engineers for demolitions work. A flight of three VMF-312 Corsairs led by Lieutenant Colonel J. Frank Cole dispersed an enemy force estimated at 200 to 300 men. The convoy was extricated and brought back to Wonsan after the 1st Marines sent out a task force consisting of four tanks, a tank dozer and six trucks filled with infantry. Personnel losses in the ambush were nine men killed and 15 wounded.[175] [175] S-2 1stMar to G-2 1stMarDiv, 1200 2 Nov 50; 1stMar tel to G-3 1stMarDiv, 1115 2 Nov 50; VMF-312 _SAR_, 8–9; 1stTkBn _SAR_, 11; 1stMar _URpt_ (_S-3_) _8_, 2–3; 1stLt J. L. Crutchfield ltr to CMC, 23 Jan 56. Ridge now had to call for an air drop in earnest. Gasoline, rations, grenades and artillery, mortar and machine gun ammunition to a total of more than 21 tons were packaged at the Wonsan airfield on 2 November by Captain Hersel D. C. Blasingame’s 1st Air Delivery Platoon. Four hours after the receipt of the message, the Air Force C-47s released 152 parachutes over the Majon-ni perimeter. This was one of the 141 replenishment missions of the Air Delivery Platoon in November, amounting to 864 man-hours of flying time and 377 tons of supplies dropped.[176] [176] 1stAirDelPlat, _HD_, _Nov 50_; 1stMar _URpt_ (_S-3_) _8_, 3.