Cargo preference bill (50-50 cargo). Hearings before a subcommittee, Eighty-third Congress, second session, on S. 3233, a bill to amend the Merchant Marine Act, 1936, to provide permanent legislation for the transportation of a substantial portion of waterborne cargoes in United States-flag vessels, May 5, 13, 17, 24, 1954.

Mode of access: Internet.

Prohibiting the right to engage in the coastwise trade to vessels built in the United States and later sold foreign: hearings before the Committee on Merchant Marine, Radio, and Fisheries, House of Representatives, Seventy-third Congress, second session on H.R. 9223, May 10, 1934.

Schuyler Otis Bland, chairman.

Ice breaker vessels for the Coast Guard : hearings before the Committee on Merchant Marine and Fisheries, House of Representatives, Seventy-fourth Congress, first[-second] session.

Schuyler O. Bland, chairman; Lindsay C. Warren, presiding April 2, 1935.

Inspection of fishing vessels. Hearings before the Committee on Merchant Marine and Fisheries, House of Representatives, Seventy-seventh Congress, first session, on H.R. 3254, a bill to safeguard and protect further the lives of fishermen at sea and to place fishing boats under the supervision of the Department of Commerce, Bureau of Marine Inspection and Navigation, and for other purposes. October 14, 23, 24, 1941.

Schuyler Otis Bland, chairman.

List of Officers of Merchant, Steam, Motor, and Sail Vessels Licensed During the Year

Mode of access: Internet.

Empowering the president to regulate ocean freight rates and to requistion vessels and increasing the powers of the United States Shipping board. Hearings before the Committee on the merchant marine and fisheries ... sixty-fifth Congress, second session, on H.R. 11361 and H. R. 11362 ...

Mode of access: Internet.

List of masters, mates, pilots, and engineers of merchant steam and other motor vessels, licensed during the year ended December 31, ... Authority: Section 4411, Revised statutes of the United States.

Mode of access: Internet.

List of officers of merchant, steam, motor, and sail vessels licensed during the year ... for a period of five years ...

Mode of access: Internet.

Commercial operation of vessels on the Great Lakes.

Mode of access: Internet.

To establish load lines for American vessels : hearings ... Seventieth Congress, second session ...

Mode of access: Internet.

Hospitalization for seamen on government vessels. Hearings ... Seventy-fourth Congress, second session, on H.R. 156, S. 2625. January 9, February 13, 1936.

Mode of access: Internet.

A memoir on the subject of a navigation act, including the encouragement of the manufactory of boats and sea vessels, and the protection of mariners.

Mode of access: Internet.

Investigation of the airborne submicrometer particles emitted by dredging vessels using a plume capture method

This paper presents a method for investigating ship emissions, the plume capture and analysis system (PCAS), and its application in measuring airborne pollutant emission factors (EFs) and particle size distributions. The current investigation was conducted in situ, aboard two dredgers (Amity: a cutter suction dredger and Brisbane: a hopper suction dredger) but the PCAS is also capable of performing such measurements remotely at a distant point within the plume. EFs were measured relative to the fuel consumption using the fuel combustion derived plume CO2. All plume measurements were corrected by subtracting background concentrations sampled regularly from upwind of the stacks. Each measurement typically took 6 minutes to complete and during one day, 40 to 50 measurements were possible. The relationship between the EFs and plume sample dilution was examined to determine the plume dilution range over which the technique could deliver consistent results when measuring EFs for particle number (PN), NOx, SO2, and PM2.5 within a targeted dilution factor range of 50-1000 suitable for remote sampling. The EFs for NOx, SO2, and PM2.5 were found to be independent of dilution, for dilution factors within that range. The EF measurement for PN was corrected for coagulation losses by applying a time dependant particle loss correction to the particle number concentration data. For the Amity, the EF ranges were PN: 2.2 - 9.6 × 1015 (kg-fuel)-1; NOx: 35-72 g(NO2).(kg-fuel)-1, SO2 0.6 - 1.1 g(SO2).(kg-fuel)-1and PM2.5: 0.7 – 6.1 g(PM2.5).(kg-fuel)-1. For the Brisbane they were PN: 1.0 – 1.5 x 1016 (kg-fuel)-1, NOx: 3.4 – 8.0 g(NO2).(kg-fuel)-1, SO2: 1.3 – 1.7 g(SO2).(kg-fuel)-1 and PM2.5: 1.2 – 5.6 g(PM2.5).(kg-fuel)-1. The results are discussed in terms of the operating conditions of the vessels’ engines. Particle number emission factors as a function of size as well as the count median diameter (CMD), and geometric standard deviation of the size distributions are provided. The size distributions were found to be consistently uni-modal in the range below 500 nm, and this mode was within the accumulation mode range for both vessels. The representative CMDs for the various activities performed by the dredgers ranged from 94-131 nm in the case of the Amity, and 58-80 nm for the Brisbane. A strong inverse relationship between CMD and EF(PN) was observed.

Antispin thrust allocation for marine vessels

In extreme weather conditions, thrusters on ships and rigs may be subject to severe thrust losses caused by ventilation and in-and-out-of-water events. When a thruster ventilates, air is sucked down from the surface and into the propeller. In more severe cases, parts of or even the whole propeller can be out of the water. These losses vary rapidly with time and cause increased wear and tear in addition to reduced thruster performance. In this paper, a thrust allocation strategy is proposed to reduce the effects of thrust losses and to reduce the possibility of multiple ventilation events. This thrust allocation strategy is named antispin thrust allocation, based on the analogous behavior of antispin wheel control of cars. The proposed thrust allocation strategy is important for improving the life span of the propulsion system and the accuracy of positioning for vessels conducting station keeping in terms of dynamic positioning or thruster-assisted position mooring. Application of this strategy can result in an increase of operational time and, thus, increased profitability. The performance of the proposed allocation strategy is demonstrated with experiments on a model ship.