To ask the Secretary of State for Northern Ireland what is the minimum depth of water at the river Bann, Barmouth at low tide; and what is the depth at Coleraine harbour at similar tide point.

[holding answer 27 February 1990]: The minimum depth at low tide at the Barmouth is 4m and at Coleraine harbour is 4·3m.

To ask the Secretary of State for Northern Ireland what is the minimum depth of water in the shipping channel to Belfast port at low tide.

[holding answer 27 February 1990]: It varies from 5·5m to 9·1m.

To ask the Secretary of State for Northern Ireland what is the minimum depth of water in the shipping channel to Londonderry port at low tide.

[holding answer 27 February 1990]: It is 6·9m.