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 August 2014 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Navigation

Maritime Academy Awarded DHS Grant for Arctic Training

Maine Maritime Academy receives $450,000 grant From U.S. Department of Homeland Security for ice navigation and maritime first responder courses for the Arctic Maine

Majority of Global Tanker Fleet Yet to Adopt ECDIS

UKHO calls on tanker owners and operators to ensure compliance with SOLAS rules on ECDIS carriage from July 1, 2015 The majority of ships in the global tanker fleet have yet to adopt ECDIS,

Haze and Reduced Visibility at Singapore Ports

Due to the presence of haze, the Maritime & Port Authority of Singapore Port Marine in their Notice No.113 of 2014 dated 15 September 2014 have informed the

Environmental

ICS Counsels Wisdom on Ballast Water Convention

The International Chamber of Shipping (ICS) has reiterated its call for governments to address the serious implementation issues concerning the IMO Ballast Water

Maritime Academy Awarded DHS Grant for Arctic Training

Maine Maritime Academy receives $450,000 grant From U.S. Department of Homeland Security for ice navigation and maritime first responder courses for the Arctic Maine

Great Lakes Dry Cargo Residue Discharge Rule in Effect

The U.S. Coast Guard published a final rule to the Federal Register announcing that it has received approval from the Office of Management and Budget for an information

Energy

Statoil: COSL Pioneer Temporarily Suspended

Due to overcapacity in their rig portfolio, Statoil will lay up the COSL Pioneer rig in the fourth quarter of 2014. The rig is currently carrying out an assignment

Buckeye Pipeline Quietly Makes Key Acquisition

Houston-based logistic firm Buckeye Partners has spent more than $3.5 billion buying assets since 2010, transforming itself from a quiet regional pipeline utility into an emerging energy powerhouse.

SBM Offshore Announces Thunder Hawk Tiebacks

SBM Offshore is pleased to announce it has signed a Production Handling Agreement (PHA) with Noble Energy to produce the Big Bend and Dantzler fields to the

Marine Power

Ship Safety: IMO Committee Agree Draft IGF Code

IMO informs that the draft International Code of Safety for Ships using Gases or other Low flashpoint Fuels (IGF Code), along with proposed amendments to make the Code mandatory under SOLAS,

Cat, Deltamarin Develop Modular FPSO Power Unit

Caterpillar Launches New Modular Solution Developed with Deltamarin for FPSO and Offshore Platform Main Power at 2014 Rio Oil & Gas Expo and Conference Caterpillar

Gas Turbine Acceptance Test Completed for S. Korea Navy

Rolls-Royce has reached a milestone in the Republic of Korea Navy’s FFX frigate program, with the successful completion of acceptance tests for the MT30 gas turbine.

 
 
Maritime Careers / Shipboard Positions Maritime Security Maritime Standards Pipelines Pod Propulsion Salvage Ship Repair Ship Simulators Sonar Winch
rss | archive | history | articles | privacy | terms and conditions | 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: 0.1692 sec (6 req/sec)