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

Navigation

Egypt to Allow 24-hour Access to East Port Said with New Waterway

Egypt plans to allow smaller vessels in the Mediterranean direct access to East Port Said around the clock instead of just eight hours a day by building a side channel near the Suez Canal,

Diesel Spill in Houston Ship Channel

A small section of the Upper Houston Ship Channel was closed Tuesday morning after a report of 1,000 gallons of diesel entered Greens Bayou from a cement facility, the U.

KEP Marine Unveils KMGBL

KEP Marine – the manufacturer of type approved displays, computers and peripherals, announced  the release of the affordable, high-quality KMGBL Glass Bridge Light Displays.

Environmental

Self-lubricating Bearing Polymer: Safe, Easy to Machine

Many plastics and metallic alloys present machining challenges as some deform and are difficult to maintain exacting tolerances, while others require strict and

Diesel Spill in Houston Ship Channel

A small section of the Upper Houston Ship Channel was closed Tuesday morning after a report of 1,000 gallons of diesel entered Greens Bayou from a cement facility, the U.

New Load Measurement Solution for Port of Dampier

Strainstall designs and delivers a load measurement solution for the world’s largest floating wharf at Port of Dampier.   Strainstall, part of James Fisher and Sons plc,

Energy

Idreco Delivers Dredger for Hydro-Dam in Congo

Idreco (International Dredger Constructions) of the Netherlands informs it has designed, built and installed its second dredger, an ISD 600 with a digging depth of 30 meters,

Offshore Wind Shift to Drive Vessel Services Cooperation

Evolving procurement processes for U.K. Round 3 offshore wind farms will require a greater number of work streams, personnel with new and differing skills, and

Damen Delivers First Twin Axe FCS for O&G

Damen Maaskant Shipyards Stellendam have a decade-long relationship with the family-run Groen Offshore, Guard & Support, having built seismic research vessels and

Marine Power

Carnival’s Costa Brand Orders Two LNG Cruise Ships

Costa’s two new cruise ships will be the largest ever built based on guest capacity; Costa will join sister brand AIDA Cruises in building the first-ever cruise

Rolls-Royce Power Package for USS Zumwalt

Rolls-Royce announced delivery of the twin fixed pitch propellers to Bath Iron Works for installation on the U.S. Navy’s most modern surface combatant, the future USS Zumwalt,

Damen Delivers First Twin Axe FCS for O&G

Damen Maaskant Shipyards Stellendam have a decade-long relationship with the family-run Groen Offshore, Guard & Support, having built seismic research vessels and

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Navigation Pipelines Pod Propulsion Port Authority Salvage Ship Electronics Shipbuilding / Vessel Construction Winch
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: 0.2839 sec (4 req/sec)