Most would agree that crew accommodation size is continuously reducing onboard new ships. Many of us have seen big crew cabins, big lounges and big gymnasiums onboard ships. However there is a trend now to have the minimum possible size of the cabins, smaller lounges and no gymnasiums onboard ships. Many suppose the reason behind this is the owner’s desire to use lesser steel and hence reduce the cost of building ship.

While this is true to some extent but not entirely. By having smaller accommodations, the owners do not just save the steel cost but also the port dues that will be incurred for the life of the ship. The port dues are based on Gross tonnage of the vessel. More the gross tonnage more will be the port dues. The larger accommodations add to the gross tonnage of the ship.

Gross tonnage calculation is defined by regulation 3 of The “International Convention on Tonnage Measurement of Ships, 1969” and is based upon two variables

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<i> • </i><i>V</i>, the ship's total volume in cubic meters (m<sup>3</sup>), and

<i> • K</i>, a multiplier based on the ship volume.

where

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<a href="http://myseatime.com/blog/wp-content/uploads/2014/11/GT.png"><img class="wp-image-279 alignleft" src="http://myseatime.com/blog/wp-content/uploads/2014/11/GT.png" alt="GT" width="241" height="31" /></a>

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And Gross Tonnage =  K x V

The volume here is the entire volume that can be used to store anything and it include accommodation too.

While the tonnage convention was not intended to affect ship design but it has done so since the time it came into force in 1982. Accommodation spaces are not the only section on the ships to suffer. There are many ships built with odd designs to reduce the gross tonnage such as ships with no forecastle deck, cut off stern and small engine rooms.

<b>Is something being done to improve living standards ?</b> : ILO has been working on with follow ups with IMO to
<ul>
	<li>Monitor developments and evaluate any amendment to or interpretation of agreements of the 1969 TM Convention that could have an impact on the Maritime Labour Convention, 2006</li>
	<li>encourage the IMO to give full consideration to possible amendments to or interpretation of agreements of the 1969 TM Convention that would lead to improved welfare of seafarers</li>
</ul>
It is but obvious that any process to change to re-evaluate the tonnage convention will be a time consuming process considering the initial tonnage convention took 13 years to ratify. We can conclude that the living standards onboard are not improving any time soon.