Strategic Planning With Aggregate Data

By Pekka Autere
Monday, April 21, 2014
Pekka Autere

A sensor is a device that measures some kind of input from the physical world. On complicated technical systems such as vessels, there is an enormous amount of different sensors. The number of sensors will surely grow as the size and cost of sensors continuously decrease. A person technically trained is able to gain some information from a single sensor reading, but the information is much more useful when the data from multiple sensors and sources is combined and aggregated at a higher level. At a higher level the whole vessel can be seen as a moving sensor that is collecting data from environmental conditions as well as the performance of the vessel.
Similarly as the information received from a single sensor is limited, it is inadequate to interpret the information from only a single vessel. By combining the information from several vessels, it is possible to form a higher level view of the entire fleet and compare individual vessel performance by creating benchmarks and baselines. By comparing a vessel performance to another vessel, or even hundreds of other vessels, it is much easier to evaluate if individual vessel performance is up to the mark or not. Aggregating information from several vessels can bring insight about how the environmental conditions affecting vessel fuel consumption differ between sea areas.
When planning a budget, vessel operators need to estimate the fuel costs for a selected route. Fuel costs depend not just on the voyage distance, route and the schedule, but also on the environmental conditions the vessel is going to face on the voyage. An interesting measure when estimating cost of a specific route is considering the average sea margin that will be experienced in that sea area. Sea margin refers to the energy used by the vessel to overcome the environmental and sea conditions. In ideal conditions vessel sea margin would be zero.
Average sea margins are bigger on the Atlantic and the Pacific Ocean. This is expected as the weather conditions and sea state are generally worse when compared to areas closer to the coast. Interestingly in the Mediterranean Sea, the sea margin is the lowest of all the defined sea areas. This is understandable as it’s a smaller sea area, where the waves are typically smaller and thus have less impact on a vessel’s energy consumption. In the Baltic Sea shallow water increases the average sea margin as vessel squatting has a big impact thus the average sea margin is larger.
The average sea margin does not, of course, tell the whole truth about the environmental conditions in that area; the environmental conditions vary seasonally and on some sea areas the conditions are always harsher. When we look at the sea margin distributions for the Mediterranean Sea and Pacific Ocean, we can see that in the Mediterranean Sea, the sea margin on the average is more likely to be less than 10%. The probability of the sea margin being over 20% is lesser than on the average. On the other hand in the Pacific Ocean it is the other way around. There the sea margin is likely to be higher than the average and sea margins of over 20% are more probable.  Showing the seasonal variation in the sea margin distributions would give even better insight of the changes in operating cost between different areas. When planning high level fleet deployment, the differences in energy consumptions in different areas due to sea margins should therefore be taken into account. For example operating in Mediterranean or in the Caribbean has over 2% difference in propulsion energy usage of the vessel. This is already a significant difference on fuel bill.
 The average sea margin in a certain sea area is certainly not the only way the aggregated data could be used. The information can be used to simulate the fuel consumption of an individual vessel on a certain route, giving even more accurate information for voyage planning. This kind of simulation would bring a new level of accuracy to fuel budgets. Although an individual measurement is difficult to interpret, aggregating data brings valuable insight to see the larger picture. High level of aggregated data can be of great help in making strategic decisions on how to operate the vessels better.


The Author
Pekka Autere, Lead Analyst, Eniram is part of Eniram analytics team and has broad experience in converting data into information and strategic guidance using mathematical and statistical modeling in different fields of application. At Eniram he has been working in developing statistical modeling and leading research team before moving to Analytics. He is a Master of Science in Automation and System Technology and System Analysis and a Master of Social Sciences in Economics.
w: www.eniram.fi
 

(As published in the April 2014 edition of Maritime Reporter & Engineering News - http://magazines.marinelink.com/Magazines/MaritimeReporter)

  • Figure of median sea margin in different sea areas based on Eniram benchmark data.

    Figure of median sea margin in different sea areas based on Eniram benchmark data.

Maritime Reporter May 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Navigation

Raytheon Anschütz Expands US operations

Raytheon Company announced the launch of its new subsidiary, Raytheon Anschuetz USA LLC, located in San Diego, Calif.    According to the company, Raytheon Anschuetz

Maritime Disputes Test China's Peaceful Rise

The South China Sea has become the most important testing ground for the changing economic, political and military relationship between China and the United States.

VIKING’s Top Safety Offerings at Nor-Shipping

Marine safety equipment leader VIKING Life-Saving Equipment will appear in force at Nor-Shipping 2015, displaying both innovative products and services that

Environmental

Great Barrier Reef Kept Off UNESCO 'Danger' List

A heritage committee of the UNESCO cultural agency stopped short of placing Australia's Great Barrier Reef on an "in danger" list, but the ruling on Friday raised

World Refugee Crisis to Worsen with Climate Change

A historic 52 million people are fleeing conflict worldwide, a trend that will intensify over the next two decades because of climate change, International Rescue

Unicom Selects the Ecochlor BWTS for 10 Tankers

Ecochlor, Inc. announced that Unicom Management Services (Cyprus) Ltd. (Unicom), acting for SCF Group, signed a 10-vessel agreement for the Ecochlor Ballast Water Treatment System (BWTS) in Limassol,

Energy

Kongsberg Contracted to Support FLNG Conversion

Kongsberg Maritime secures position in the LNG market with electrical and automation contract for Golar Hilli FLNG   Keppel Shipyard in Singapore and Black & Veatch in the U.

Statoil Awarded Licenses Offshore Nicaragua

Statoil informs it was today awarded four licenses offshore the Nicaraguan Pacific, covering an area of about 16,000 km2 in the largely unexplored Sandino Basin.

US Oil Contango Vanishing as Supply Glut Shifts Abroad

The U.S. oil market is on the brink of returning to a more bullish footing known as backwardation for the first time in six months, with the discount for prompt

Marine Power

New Power Optimization Solution for LNG Carriers

NAPA and DSME launch tailored NAPA-DSME Power Solution for LNG carriers; leading LNG carrier shipyard offers specialized performance monitoring solution   South Korean shipbuilder,

New Ship Continues Atlantic Offshore's Fleet Modernization

Atlantic Offshore Rescue will unveil the third new vessel in the past 12 months as part of its fleet modernization program, representing an investment totaling $458 million.

Iran, Oman Sign Maritime Agreement

Iran's Mehr news agency said that Iranian Foreign Minister Javad Zarif and Omani Foreign Minister Yusuf bin Alawi have announced that the two countries have agreed

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Standards Naval Architecture Navigation Offshore Oil Port Authority Ship Electronics Ship Repair Shipbuilding / Vessel Construction
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.1926 sec (5 req/sec)