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

Navigation

Milaha Reports Improved Net Profit for Q1

Qatar Navigation (Milaha) Q.S.C. has announced its financial results for the three months ended March 31, 2015, in which it reported operating revenues of QR 786 million vs.

Northrop Grumman Navigation Systems for Canadian Navy

Northrop Grumman Corporation's Sperry Marine business unit has been selected to design and supply gyrocompass navigation systems for 12  Kingston Class coastal

USCG Searching for Missing Boaters in Mobile Bay Area

The Coast Guard continues to search for at least five people in the Mobile Bay area Sunday. Rescuers searched throughout the night for the missing boaters and have covered a total of 1,

Environmental

ExxonMobil Debuts Premium AFME 200

To help shipowners meet strict new emission mandates, ExxonMobil expanded its range of fuels for use within Emission Control Areas (ECA) with the introduction of

Ecochlor BWTS

Ballast water treatment technology developer Ecochlor Inc. presented a project case study at CMA Shipping 2015, a case study which covered the retrofit of Ecochlor’s

GEA UV Ballast Water Treatment

Earlier this year GEA won the first contract for equipping cruise liners with its UV ballast water treatment system, BallastMaster marineX, powered by Trojan Marinex.

Energy

BHGI-designed ATB Unit Under Construction

Bristol Harbor Group, Inc. (BHGI) informs it is currently completing the detail design phase of a 399’ x 74’ x 30’ 80,000 BBL double hull oil tank barge and a 120’

Maritime Tension Dominates Southeast Asia Summit

Southeast Asian leaders edged closer to open criticism of China's land reclamation in the disputed South China Sea at a regional summit on Monday, as the Philippines

Lagos Port Drags on Africa's Top Economy

Ruling party reforms improved Apapa port; shippers still face delays and corruption. The road leading to the Lagos port, which handles nearly everything that Africa's biggest economy imports,

Marine Power

ExxonMobil Debuts Premium AFME 200

To help shipowners meet strict new emission mandates, ExxonMobil expanded its range of fuels for use within Emission Control Areas (ECA) with the introduction of

ABB's New Azipod Thruster

ABB has released details on its latest generation Azipod thruster, a unit which ranges in power from 1.6 megawatts to 7 megawatts (MW) and is intended to serve a growing electric propulsion market.

EPA Promotes Green Initiatives at Port of Houston

U.S. Environmental Protection Agency (EPA) Administrator Gina McCarthy visited the Port of Houston April 24 to highlight grants aimed at improving air quality. The port will receive about $900,

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Offshore Oil Pod Propulsion Port Authority Ship Electronics Ship Repair Shipbuilding / Vessel Construction Sonar
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: 0.2074 sec (5 req/sec)