Page 35: of Maritime Reporter Magazine (October 15, 1983)

THE ASEA OPTITRIM SYSTEM SHOWS YOU

HOW TO CUT FUEL COSTS

AND PAYS FOR ITSELF IN LESS THAN A YEAR

OPTITRIM: • tells in figures how many tons of fuel/day can be saved if the ship is loaded to optimum trim at a given speed and displacement. • helps to plan the loading of cargo, the bunkering of fuel oil and fresh water and the correct position- ing of ballast in order to make maximum fuel savings.

Examples of calculations

OPTIMUM TRIM SPEED = KNOTS

BASIC OPTIMUM ACTUAL

DRAFT AFT (Ml

DRAFT FWD (M)

DRAFT MEAN (M)

TRIM (M)

FUEL SAVING (T/D)

CARGO % VOL MJ/T WEIGHT

HOLD NO. 1 0 0 0 0

HOLD NO. 2 20 1360 0.4300 3163

HOLD NO. 3 20 1356 0.4300 3153

HOLD NO. 4 70 4844 0.4300 11 265

HOLD NO. 5 0 0 0 0

TOTAL 17 581 1. Cargo

Each hold can be loaded either in percent, volume or weight. In the case of percent and volume a stowing factor has to be added.

OPTIMUM TRIM SPEED = KNOTS

BASIC OPTIMUM ACTUAL

DRAFT AFT (M) 9.72

DRAFT FWD (M) 7.22

DRAFT MEAN (M) 8.47

TRIM (M) 2.5

FUEL SAVING (T/D)

CARGO % VOL MVT WEIGHT

HOLD NO 1 0 C 0 0

HOLD NO 2 20 1360 0.4300 3163

HOLD NO. 3 20 1356 0.4300 3153

HOLD NO. 4 70 4844 0.4300 11 265

HOLD NO 5 0 0 0 0

TOTAL 17 581 2. Draft and trim calculation

The instrument calculates forward, aft mean draft and trim. • tells how to burn bunker fuel in the most economical manner.

OPTIMUM TRIM SPEED = 5 KNOTS

BASIC OPTIMUM ACTUAL

DRAFT AFT (M) 9.72 7.32 8.48

DRAFT FWD (M) 7.22 9.62 8.45

DRAFT MEAN (M) 8.47 8.47 8.46

TRIM (M) 2.5 - 2.3 0.03

FUEL SAVING (T/D) 4.97 2.99

CARGO % VOL MVT WEIGHT

HOLD NO. 1 0 0 0 0

HOLD NO. 2 29 2005 0.4300 4663

HOLD NO. 3 20 1356 0.4300 3153

HOLD NO. 4 61 4199 0.4300 9765

HOLD NO. 5 0 0 0 0

TOTAL 4. Load shifting

The operator can shift cargo from one hold to another and immediately read off the difference in fuel saving by so doing. 1500 tons shifted from 4 to 2

OPTIMUM TRIM SPEED = 15 KNOTS

BASIC OPTIMUM ACTUAL

DRAFT AFT (M) 9.72 7.32 8.05

DRAFT FWD (M) 7.22 9.62 9.18

DRAFT MEAN (M) 847 8.47 8.61

TRIM (M) 2.5 —2.3 —1.13

FUEL SAVING (T/D) 4.97 3.92

BALLAST % VOL SP.GR WEIGHT

TANK 1.1 FP 100 505 1000 505

TANK 1.2+1.3 0

TANK 1.4 + 1.5 0

TANK 1.6+1.7 0

TANK 1.8+1.9 0

TANK 1.10+1.1 0

TANK 1.12 AP 0 5. Ballast

Every factor that affects the trim is taken into consideration. In this example the forepeak is filled to 100% with water. A fuel saving ensued of one ton per day.

OPTIMUM TRIM SPEED = 15 KNOTS

BASIC OPTIMUM ACTUAL

DRAFT AFT IM) 9.72 7.32

DRAFT FWD (M) 7.22 9.62

DRAFT MEAN (Mi 8 47 8.47

TRIM (M) 2.5 - 2.3

FUEL SAVING (T/D) 4.97

CARGO % VOL MVT WEIGHT

HOLD NO. 1 0 0 0 0

HOLD NO. 2 20 1360 0.4300 3163

HOLD NO. 3 20 1356 0.4300 3153

HOLD NO 4 70 4844 0.4300 11 265

HOLD NO. 5 0 0 0 0

TOTAL 17 581 3. Optimum trim calculation

An estimated average speed of the vessel is used as an input. The instrument calculates the OPTIMUM trim for

BASIC mean draft and presents the optimum fuel saving in tons per day when the ship is retrimmed to its optimum.

Dill 2 r(7 ^ E«>M op.,mom ma, Full dr

Slarwara | i i

Dilfmax.^ 7 /

Ballast

Write For Free Literature...

HOW TO REDUCE FUEL COSTS

WITH THE ASEA OPTITRIM SYSTEM

Write today...for free literature describing how the ASEA OPTITRIM

SYSTEM works for you...to reduce fuel consumption... reduce costs... by loading your ship to optitrim trim.

It works for other owners...put it to work for you.

Changing technology for changing times.

U.S.A. HEADQUARTERS

ASEA, INC. 4 NEW KING STREET,

WHITE PLAINS, N.Y. 10604

TEL: (914) 428-6000 TELEX: 137401

October 15, 1983 Write 161 on Reader Service Card 37