I recently read a great article about Oman:

Donaldson, William. 1994. “Units of Counting and Aggregation in Omani Arabic.” Journal of Semitic Studies 39: 87-96. https://doi.org/10.1093/jss/XXXIX.1.87

The same author also wrote:

• Donaldson, William. 1979. Fishing and Fish Marketing in Northern Oman: A Case Study of Artisanal Fisheries Development. Doctoral thesis, Durham University.
• Donaldson, William. 2008. “Enterprise and Innovation in an Indigenous Fishery: The Case of the Sultanate of Oman.” Development and Change 11: 479-95.

I think it is so interesting when a researcher gives a clear overview of a small aspect of a culture. I ran into the issue of how to count items when I was doing work on fishing a few years ago. At that time I noted:

Oman uses the metric system but different measuring systems are used in fishing. Boats are ordered by ‘feet,’ petrol is measured by ‘drum’ (8 Omani Riyal for a standard 30-liter petrol can), engine power is by ‘horsepower,’ and the radius of circular sardine nets is by dhirae (‘arm’ in Arabic, from the inside, centre point of right elbow to tip of middle finger on right hand). The depth of water, the size of fish boxes (traps) and the height of a curtain nets is by ba’ (from furthest edge of left shoulder to tip of middle finger on right hand).