Firing exercises will take place at Castle Martin Firing Range until 27 June 2025, excluding weekends.

  1. MARINERS ARE HEREBY ADVISED that a large-scale military firing exercise by the MOD will be conducted at Castle Martin Firing Range, resulting in an extended Sea Danger Area (SDA).   Mariners are requested to not enter this SDA. 
  2. The exercise will take place until 27th June 2025, between 0800 and 0300 local time daily (excluding weekends). 
  3. The Sea Danger Area is bounded by the following positions (WGS84 Datum). (The approximate area of operations is illustrated in the Chartlet below). 

    Point 

    Latitude (N) 

    Longitude(W) 

    Point 

    Latitude (N) 

    Longitude(W) 

    A 

    51°39.131’N 

    005°03.548’W 

    G 

    51°33.878’N 

    005°07.825’W 

    B 

    51°39.584’N 

    005°04.730’W 

    H 

    51°32.064’N 

    005°03.925’W 

    C 

    51°39.615’N 

    005°08.580’W 

    I 

    51°31.392’N 

    004°59.850’W 

    D 

    51°37.755’N 

    005°10.618’W 

    J 

    51°33.065’N 

    004°55.195’W 

    E 

    51°36.551’N 

    005°10.391’W 

    K 

    51°33.722’N 

    004°54.868’W 

    F 

    51°35.254’N 

    005°09.561’W 

    L 

    51°35.785’N 

    004°55.573’W 
    A map of the ocean AI-generated content may be incorrect., Picture                                                                                                            (Note: The boundaries shown in the chartlet are for approximate visual reference only and must not be used for navigation.)
  4. All mariners are hereby advised to navigate with caution and keep well clear of the defined boundaries. Anchoring or drifting within the area is strictly prohibited during the operational period stated. 
  5. Admiralty Charts for reference 2878, 3273. 
  6. For Further details please contact Range Control (Call sign: Castlemartin Range Control) on VHF Ch16 or call 01646 662367  
  7. This Notice to Mariners will self-cancel at 23:59 on 27th June 2025.