Track space for a search operation would be based on:
(a) The target definition (size, afloat Yes/No).
(b) Day or night search time.
(c) State of visibility, rain, fog, mist or snow.
(d) The likely quality of radar target presented, if any.
(e) The height of eye and prominence of lookouts.
(f) The number of surface search units employed.
(g) The searching vessels speed of operation.
(h) Recommendations from Rescue Co-ordination Centre (RCC) and/or On Scene Co-ordinator (OSC).
(i) Recommendations from the International Aeronautical and Marine Search and Rescue (IAMSAR) Manual.
(j) Area and intended search time before nightfall.
(k) Availability of search lights for night operations.
(l) Master’s experience.