Table 1. Comparison chart of the remoteness, above water environment and hydrology of the two farming sites, near shore in the Tuna Farming Zone (TFZ) and offshore.

Description Parameter		Near shore (TFZ)	Offshore	Reference
Remoteness	Distance from shore	16nm	25nm
	Average number days per week site could be accessed by vessel	6–7 days	4–6 days
Above water environment	Average wind speed	8.96knots	11.22knots	4
	Maximum wind speed	32.53knots	36.85knots	4
Hydrology	Water depth	20m	40m
	Maximum significant wave height	0.8m	1.5–2m	5
	Tidal flow at 3.2m above seafloor	≤0.1m s-1	>0.5m s-1	6–7
	Flushing rate	2 days	<6hours	6
	Number of days per year sediments in top 10m of water column	5–10	<1	5
	Sediment environment	Depositional	Erosional	5

Distance from shore is represented as distance from port. Wind Speeds were measured using weather stations at Boston Island for the near shore site and an average of stations at Spilsby Island and Thistle Island (Figure 1).