From
here.
In order to succeed in either the MarStrike or LitM role, the CVS will need to operate effectively within the littoral environment (defined as coastal sea areas and that portion of the land, which is susceptible to influence or support from the sea). To achieve this, sea lines of communication between support vessels and the battle area/theatre of operation need to be protected at all times. Integrated with other task group units, aircraft, such as the Merlin HM Mk1 and Sea King ASaC Mk7, will be used to achieve the sea control (or freedom of action to use the sea for our own purpose) necessary to assure littoral access.
Errr...........think they do sometimes.