April, 1924 ship at least one-third of this amount would be used. On the above basis, the steamship would show a saving of $92 per month for this item while at sea. In port, the saving would amount to about $30 per month. The outstanding factors in favor of the motorship in the comparison in Lables ti lil and IV are: 1. The saving in fuel costs per day in port, $82.50. 2. The saving in fuel costs per day at sea, $205.00. 3. The saving in the carrying of large quantities of fuel oil or greatly in- creased steaming radius. 4. The saving in the carrying and purchase of large quantities of fresh water. 5. The saving in wages and_ sub- sistence of engine room crew per day, $14.10. 6. Approximately 9000 greater cargo capacity. cubic feet Where Steamship Leads The steamship is favored by the fol- lowing: 1. From the scales on their respective capacity plans for the same draft the deadweight is about 85 tons greater. 2. An estimated saving in lubricating oil at 58% cents per gallon of $3.07 per day at sea and $1.00 per day in port. 3. Slightly less gross and net United States register and Panama canal ton- nage—a saving in each transit of the canal of $96. From the above, the actual saving of the motorship over the steamship in op- erating expense per day at sea is $246 MARUNE -REV-LEW and in port $95.60. Besides this saving in disbursements, a much larger dead- weight cargo can be carried in place of the excess fuel oil and fresh water needed for the steamship, or by the same token the motorship will have a greatly increased steaming radius for the same cargo. The difference in draft for of the three voyages for the steamship Hoc Istanp and the average draft for the single voyage of the motorship SEEK- ONK shown in Table IV might indicate that the comparison of performance is the mean S. S. Hog Island Per month 1-—Chiefiengineera: 5 5 $250.00 1— First ass’t. engineer............ 185.00 1—Second ass’t. engineer.......... 165.00 1—Third ass’t. engineer........... 150.00 3-—-Oilens abrp/2.oU ts cere es 217.50 3—Water tenders at $72.50....... 217.50 2—Wipers at $57.50;.....6..).25... 115.00 3—Firemen at $65.00............. 195.00 15 Total in engine room crew...... $1495 .00 TABLE III ENGINE ROOM CREWS AND WAGES Saving in Engine room wages per month......... Saving in subsistence, 6 men at 65 cents per day.... Total saving peromomntli,. ssc scare ater 121 ANOTHER VIEW OF RAISED PLAT- FORM ILLUSTRATING HOW ONE OP- ERATOR CAN MANIPULATE BOTH WINCHES AT ONICE—AT LEFT, RAISED PLATFORM FOR WINCHES not justified. Increase in draft, of course, means additional resistance to propulsion. Great extremes of draft on TABLE II Cargo and Tank Capacities M.S. S.S: Seekonk Hog Island Cargo. Capacities: Bales-custtera savas 382,210 373,220 Grarcuxmtt..0 3: cae 407,580 400,210 Reserve feed water in CONBiss Geiss eee cars none 357 Fresh water in tons.... 97 97 Fuel oil tank capacities IN2 tonsa gern ries 1100.6 1222.8 Ballast tank capacities 1D TONS fsa y aes 2646.6 2395.0 Deadweight in Tons M.S. $:S; Seekonk Hog Isiand Mean light load line, ft., ANS eee at era 8-11% 8-6 Corresponding dead - Weilehteacee evinces 0 ‘0 Mean full load line, ft., TINS oS euacacer eo nesses 24-4 24-53; Corresponding dead- WelohtetOnse cnet ae 7690 7815 Freeboard at full load, spe ol ey Peer eME ras Gate 7-10 7-9 1% M. S. Seekonk Per month 1—Chief engineer............... $250.00 1—First ass’t. engineer........-.. 185.00 1—Second ass’t. engineer......... 165.00 1—Third ass’t. engineer.......... 150.00 I-——Blectticianssicce. dansk 3 patos nies 150.00 B= Oilersiat $72.00 seca sisueene 217.50 I—PExtra maniat $72.50... 0.0.4. 72.50 29 Total in engine room crew...... $1190.00 $305 .00 117.00 $422.00