replacement of the two rails. This procedure is expected to take 

 longer than the time required for deployment over the rollers at the 

 bow. (2) Removal of rails from one side leaves three sides of the FTB 

 with nothing for the crew to grab in case of emergencies, particularly 

 under v;ind and/or wave conditions. Removal of rails for 

 deployment/retrieval purposes is, therefore, not recommended for 

 safety reasons. 



If deployment of boom from the port side is considered desirable, 

 as in reference 8, then it is recommended that the FTB design be 

 changed by adding support rails on the bow and the stern, by removing 

 bow and stern rollers, and by adding a roller on the port side. 



For deployment with the boom faked athwart ship, the number of 

 people required was the same as with deployment of the boom when stored 

 fore and aft. However, the time required to complete the deployment was 

 6.65 minutes the first time, and 4.30 minutes when the test was 

 repeated. The difference of 2.35 minutes appears large as a percentage 

 of the total time , but it really is small when it is considered that 

 even small waves and winds makes it necessary for the crew to 

 continuously maneuver the boats to keep the boom centered over the 

 roller, which affects the time measurements in minutes rather than 

 seconds. Wind and wave conditions were calm during these measurements; 

 however, under measurable wind and wave conditions, the deployment and 

 retrieval may take considerably longer than the time reported here. 



Retrieval : For retrieval of boom from water to the deck of the FTB, 

 a total of seven men was required. In addition to two men in a UTB 

 required to assist whenever necessary, and one man at the controls of 

 the FTB, four men were required to pull the boom out of water and fake 

 and stack it on the deck. These latter four men worked in teams of two, 

 alternating pulling the boom over the roller and faking the boom on the 

 deck athwartship. 



The retrieval test was carried out three times. The first time it 

 took the crew 22.9 minutes and the last two times it took them 18 

 minutes to retrieve the 900-ft boom. At the end of each retrieval, the 

 men were noted to be perspiring heavily, even when there were negligible 

 wind and waves. In more normal weather conditions of a harbor, 

 considerably more time may be required for retrieval than the 18 

 minutes recorded in the test program. 



The boom retaining cylinders (guard pipes) were removed from the 

 FTB during deployment, but these cylinders were used for keeping the 

 boom centered on the deck during retrieval. 



Transfer of Boom from the Flattop Boat to the Pier 



The retrieval of the 900-ft boom from the FTB back to the pier was 

 carried out under the calm condition of negligible waves and winds. Two 

 men were required on the FTB to bring the boom towards the PAU and keep 

 it in line with it. Six men were required on the pier: two men to 



20 



