Page 30: of Maritime Reporter Magazine (January 1973)

Shell International

LPG Ship Insulation

Approved By Lloyd's

Lloyd's Register of Shipping has approved an insulation system and cargo barrier for LPG ships pro- posed by Shell International Marine.

The system is based on the use of foamed polyurethane sprayed on the interior surface of the inner hull of a double-hulled ship. The foam thus acts as both the primary barrier and the insulation of the LPG cargo.

The secondary barrier will be the inner hull itself, and it is proposed to construct this of Lloyd's Grade

E quality steel. This is a fine grain notch tough structural steel which can be used in this application for cargo temperatures clown to —50° C.

It is claimed that this design could reduce the cost of an LPG ship con- siderably.

Surveyors of Lloyd's Register col- laborated with Shell International

Marine Ltd. during a comprehensive test program. The program was de- signed to prove the performance of the foam under normal operating con- ditions.

Following successful laboratory tests and tests on a model tank, the system was then tested in two 100- ton capacity LPG tanks fitted in the

No. 1 center cargo hold of the S/S

Aulica, an 18,000-ton general prod- ucts tanker.

The results of the tests have shown that the system is suitable for the carriage of LPG at a minimum tem- perature of —50° C.

Huron Cement Div.

Appoints J.L. Greer

Jed L. Greer

The Huron Cement Division of

National Gypsum Company has announced the appointment of Jed

L. Greer to the newly created posi- tion of director of distribution car- rying the overall responsibility for the operations of the vessel and distribution plant departments. At present, the Huron fleet is made up of six active cement carrying vessels, and the distribution plants are located in 14 different major marketing areas around the Great

Lakes.

Mr. Greer is a graduate of the

University of Missouri and has been employed by Huron in vari- ous responsible capacities during the last nine years. His most recent assignment was superintendent of plants.

E. Canadian SNAME

Hears Paper On

Doppler Sonar Products

Guest speaker William Otis (right) of Sper- ry Marine Systems Division, Sperry Rand

Corporation, is shown with R.C. Truax, chairman of the Eastern Canadian Section.

The Eastern Canadian Section of The Society of Naval Architects and Marine Engineers held its sec- ond meeting of the current season in Quebec City, following the pre- cedent established last season.

The guest was William Otis of

Sperry Marine Systems Division,

Sperry Rand Corporation, Charlot- tesville, Va., who read the paper titled "Doppler Sonar Products for the Marine Industry." The paper was prepared by Morton Howard of the same company, who was un- able to attend due to previous com- mitments.

The paper highlighted the recent- ly introduced new products, using the doppler principle, and their ap- plication to the marine industry.

The presentation was followed by a discussion from the floor, ably handled by Mr. Otis. ~ I crewboat opera Hon cost cut $5,000 per year with

JacuzziJet

JacuzzUets have recorded with transmission, reduction over 3 million hours oper- gear, clutch and propeller ating time. No wonder they problems, while the are the preferred jet JacuzziJet is on the water. propulsion on crewboats.

The smoothness of the

JacuzziJet thrust also reduces pulsation to the engine and hull. This not only extends engine life, but greatly reduces noise ana vibration levels throughout the boat.

JACUZZI BROS. INC., Marine Jet Department/11511 New Benton Highway/Little Rock, Arkansas, 72203.

JacuzzUets are engineered to exceed 4,000 hours belween overhauls.

Write or phone us today for the complete story. We have the JacuzzUets to meet your engine power reguirements—turbine, diesel, or gas.

Operation records show outstanding savings over comparable prop drive boats. Savings of over $5,000 per year were recorded with a typical twin engine crewboat equipped with a JacuzziJet 20VJ series ... such as those owned by ESSO Maracaibo.

The records also show that a JacuzziJet delivers more passenger miles due to increased capacity. Less downtime can always be expected because a

Jacuzzi unit has less moving parts and no protruding underwater parts. Prop driven boats are in the yard 32 Maritime Reporter/Engineering News