The Charles McCartney, powered by GM Electro-Motive Division diesels, has over 4,600
square feet of clear deck space for the transportation of supplies and material.
Arthur Levy Boat Service. Inc.,
Morgan City, La., has added two
new vessels to its Seahorse Fleet.
One is an A.B.S. Class A-l Maltese
Cross tug built by Burton Ship-
yard, Inc., Port Arthur. Texas, to
be used for towing, anchor han-
dling and transporting supplies.
The other is a triple-screw Coast
Guard Certified crewboat built by
Sewart Seacraft, Inc.. Berwick, La.
The M/V Charles McCartney
has dimensions of 185 feet by 40
feet by 17 feet. The Burton hull
was redesigned for Arthur Levy
Boat Service by Breit Engineering,
Inc. of New Orleans, La. This
modification provided both increas-
ed speed and bollard pull. It is
powered by two General Motors
Electro-Motive Division diesel en-
gines coupled to Lufkin two-speed
reverse reduction gears. 4,300 con-
tinuous shaft horsepower propels
the boat at 17-mph and also pro-
vides 116,000 pounds of bollard
pull. A 47-inch Bird-Johnson bow
thruster powered by a Caterpillar
D-333 provides maneuverability.
For towing and anchor han-
dling this boat is equipped with
SMATCO 66-DAW-200, 225,000-
pound single-line pull winch, a fair-
lead, a wood deck covered with
steei and a 36-inch stern roller. Aft
steering and winch controls facili-
tate these operations as well as
general boat handling near offshore
structures.
Transportation of supplies and
material is easily handled with over
4,600 square feet of clear deck
space. Four 620-cubic-feet and two
700-cubic-feet vertical Halliburton
bulk drilling mud and cement tanks
are built in the hull with a remote
loading and unloading station lo-
cated on the forecastle deck. A
General Motors 8V-71 diesel-driven
600-CFM Fuller C-120 air com-
Certified to carry 48 passengers, the all-aluminum triple-screw crew
boat Amazon Seahorse recorded a speed of 30 mph during her trials.
Arthur Levy Boat Service Adds Two
New Vessels To Its Global Seahorse Fleet
Controllable-Pitch Propellers -
(Continued from page 8)
the one previously described for
the Neste ships. Should there be a
tendency for an engine to become
overloaded, the load control re-
ceives a signal resulting in pitch
reduction until the overload is
eliminated.
The propulsion machinery for
the three steam turbine tankers for
San Juan Carriers is shown in Fig-
ure 2. One high-pressure and one
low-pressure turbine totaling 25,-
500 shp are driving the propeller
through reduction gears at 85 rpm.
The machinery is unidirectional
and thus has no astern turbine.
The high-pressure turbine drives a
generator and a feedwater pump
through an automatically control-
led friction clutch and a reduction
gear, when the shaft speed is be-
tween 95 percent and 103 percent.
Beyond these limits the generator
and the feedwater pump are driv-
en from a back-up turbine which
is always rotating. The friction
coupling is clutched or declutched
automatically at the set speed
limits. The system has a time pro-
grammed unit which increases the
propeller pitch stepwise during the
warming up period of the turbine.
In an emergency this time program
can be bypassed. This system was
developed by Karlstads Mekaniska
Werkstad which has acted as con-
sultants to Mitsubishi who built
the system. There are three control
stands on the bridge and one in
the engine room. The remote con-
trol is pneumatic.
In the maneuvering mode with
50 rpm all maneuvering is carried
out by pitch changing and propel-
ler revolutions are kept constant
by the turbine governor through
the main steam valve. At part loads
in the sea mode with the shaft gen-
erator and feedwater pump con-
nected, the power is also controlled
by setting propeller pitch and keep-
ing 85 rpm with the turbine gover-
nor. At full power in the sea mode,
the maneuvering lever on the
bridge is set in its furthermost
ahead position. Then the steam
valve is fully opened while the
turbine governor is set at 105 per-
cent rpm. The load control is con-
nected and keeps the revolutions
constant at 85 rpm by correcting
pitch. When decreased power is
demanded, the reverse takes place,
i.e. the turbine governor is con-
nected and controls the steam valve
while the propeller load control is
disconnected. At crash astern and
crash ahead, maneuvering is car-
ried out by pitch changing and the
turbine governor keeps the propel-
ler revolutions at about 85 rpm. At
the crash stop astern tests, the pro-
peller speed varied between 82 and
87 rpm, i.e. 96.5 percent and 102.4
percent which are within the limits
prescribed.
No doubt these three steam tur-
bine tankers will be followed with
great interest by shipowners as
well as shipyards. As this propul-
sion system is simple and has
proved reliable, more vessels are
likely to be similarly equipped.
P&O Building 25 Ships
—16 In British Shipyards
Two British Shipbuilding groups
have won orders worth nearly $39,-
600,000 for six vessels.
Upper Clyde Shipbuilders (UCS)
are to build a series of four bulk
carriers worth about $33,600,000
for Lyle Shipping and H. Hogarth
and Sons, two of Glasgow's oldest
shipping companies. The ships are
a development of the group's bulk
carrier design and will be built to
a very high specification under the
supervision of the Scottish Ship
Management, who will also man-
age the vessels when they go into
service. Deliveries are scheduled
between late 1972 and mid-1973.
These orders bring the value of
the Glasgow-based consortium's
order book to around $192,000,000.
Since January the group has taken
orders worth between $160,800,000
and $168,000,000 for 25 ships. Sev-
enteen of these are bulk carriers
and the other eight are for the
group's "Clyde" design standard
cargo ship.
The other two new orders, worth
pressor located in the engine room
provides air pressure for transfer-
ring bulk material. Over 108,000
gallons of fuel and 3,400 barrels
of drill water can also be delivered
with this vessel.
The boat is equipped with an
Apelco AE190CM, a Decca RM 316
radar, a Decca RM 326 radar, a
Simrad ES 2 BM Fathometer, a
Sperry Mark 27 combination gyro
compass and auto pilot, a Benmar
100 ADF, a RF-201M single side
band, a DX navigator Loran and a
Hallicrafter receiver. This naviga-
tional and communications equip-
ment enables this vessel to operate
anywhere in the world.
Twenty berths, nine state rooms,
central air-conditioning and heat-
ing, a 1,000-cubic-foot freezer and
chiller and a large galley and
lounge provide adequate facilities
for crew members and passengers.
The Amazon Seahorse is an all-
aluminum crewboat that is 85 feet
by 20 feet by 8 feet. It is powered
by three General Motors 12V-71N
diesel engines developing 1,350
horsepower through Twin Disc 512
2:1 reduction gears. Two General
Motors 2-53 diesels driving Delco
20-kw generators, supply electricity
for the vessel.
A speed of 30 mph was recorded
during the shipyard tests of this
boat. It will operate at a speed of
26 mph with a fuel capacity of 3,-
200 gallons and a range of 700
miles.
This vessel is certified to carry
48 passengers. It has central air-
conditioning and heating, 36 re-
clining seats, a lounge, 4 state
rooms and 8 berths to accommo-
date the passengers. This is in ad-
dition to the crew quarters.
It is also equipped with a Ray-
theon 1130 AM radio, a Decca 202
radar and DE726 Fathometer.
Stern controls, dry exhaust stacks
and a 570-square-foot wood cover-
ed deck are some additional fea-
tures.
The addition of these two vessels
to the Seahorse Fleet brings the
total to 45. This total includes
crewboats from 65 feet to 110 feet,
utility vessels from 87 feet to 110
feet, supply vessels from 130 feet
to 176 feet, and combination tug/
supply vessels from 176 feet to 185
feet. Nine more vessels are being
built for Arthur Levy Boat Serv-
ice, Inc., six of which will be ready
this year. At the end of this year
the Seahorse Fleet will have 51
vesse's operating in six countries
around the world.
about $6,000,000, were placed with
Aberdeen, Scotland shipbuilders
Hall, Russell and Co., by the Liver-
pool-based Moss Hutchinson Line,
a member of the P. & O. group.
The two, 38,850-ton gross cargo
liners will carry general and perish-
able cargo between Britain and
eastern Mediterranean countries.
One is due for delivery in Novem-
ber next year and the other in
February 1972. This brings the
number of ships on order for P. &
O. to 25, of which 16 are being
built in British yards.
10 Maritime Reporter/Engineering News
Digital Wave Publishing