HYDROARC IN FORCE AS OF 161315Z APR. To receive Broadcast Warning messages via email, go to msi.nga.mil and click on the 'NAVIGATION WARNINGS' button under the 'Subscription Services' section. The In-Force Navigational Warnings obtained via this service and the availability of Navigational Warnings via alternate NGA subscription services does not relieve Masters / Captains of the requirement to receive Navigational Warnings through IMO approved broadcast services in accordance with the provisions of the International Convention for the Safety of Life at Sea (SOLAS). This information is provided as a supplement to those approved services. 121544Z APR 24 HYDROARC 56/24(GEN). 1. HYDROARC WARNINGS IN FORCE AS OF 121527Z APR. ALL THE INFORCE WARNINGS ARE LISTED HERE. 55/2024, 54/2024, 53/2024, 52/2024, 50/2024, 42/2024, 23/2024. 272/2023, 270/2023, 269/2023, 259/2023, 258/2023, 254/2023, 243/2023, 240/2023, 239/2023, 178/2023, 163/2023, 162/2023, 157/2023, 156/2023, 155/2023. 293/2022, 291/2022, 262/2022, 260/2022, 235/2022, 228/2022, 224/2022, 223/2022, 198/2022, 175/2022. 208/2021, 207/2021. 2. THE COMPLETE TEXT OF ALL IN-FORCE HYDROARC BROADCAST WARNINGS ARE AVAILABLE ON THE NGA MARITIME SAFETY INFORMATION WEBSITE AT: MSI.NGA.MIL/NAVWARNINGS. ALTERNATIVELY, THESE MAY BE REQUESTED BY E-MAIL FROM NGA AT NAVSAFETY@NGA.MIL. 3. CANCEL HYDROARC 49/24. 120914Z APR 24 HYDROARC 55/24(42). BARENTS SEA. RUSSIA. DNC 22. 1. HAZARDOUS OPERATIONS, ROCKET LAUNCHING 1500Z TO 0100Z DAILY 17 THRU 20 AND 22 THRU 27 APR IN AREA BOUND BY 70-34.00N 035-30.00E, 70-34.00N 038-00.00E, 69-45.00N 038-00.00E, 69-45.00N 035-30.00E. 2. CANCEL THIS MSG 280200Z APR 24. 120043Z APR 24 HYDROARC 54/24(15). BEAUFORT SEA. CANADA. DNC 27. BAILLIE ISLAND SAND SPIT, MARKED BY DAYMARK, SHIFTED ALONG TRACKLINE JOINING 70-30.56N 128-20.88W, 70-30.35N 128-20.74W, 70-30.10N 128-19.97W. 110102Z APR 24 HYDROARC 53/24(42). BARENTS SEA. RUSSIA. DNC 22. 1. HAZARDOUS OPERATIONS, ROCKET LAUNCHING 0930Z TO 1100Z DAILY 15 THRU 30 APR IN AREA BOUND BY 73-31.48N 044-22.53E, 74-14.06N 039-11.16E, 70-38.00N 033-20.00E, 69-45.00N 038-30.00E. 2. CANCEL THIS MSG 301200Z APR 24. 100707Z APR 24 HYDROARC 52/24(41). ARCTIC. EAST SIBERIAN SEA. RUSSIA. DNC 27. 1. HAZARDOUS OPERATIONS, ROCKET LAUNCHING 0930Z TO 1100Z DAILY 15 THRU 30 APR IN AREA BOUND BY 76-48.44N 150-51.31E, 77-25.37N 155-33.18E, 74-58.21N 161-59.37E, 73-53.25N 161-19.49E, 74-12.30N 157-26.27E. 2. CANCEL THIS MSG 301200Z APR 24. 240216Z FEB 24 HYDROARC 23/24(41). CHUKCHI SEA. DNC 27. SCIENTIFIC MOORING, TOP FLOAT 42 METERS ESTABLISHED IN 75-06.02N 168-00.04W. 270133Z OCT 23 HYDROARC 272/23(15). LANCASTER SOUND. CANADA. DNC 28. 13.9 METER SHOAL IN 73-43.41N 081-13.62W. 250632Z OCT 23 HYDROARC 270/23(16). BEAUFORT SEA. ALASKA. DNC 27. 1. SCIENTIFIC MOORINGS ESTABLISHED IN: A. 71-47.78N 155-20.81W, TOP FLOAT 15 METERS. B. 71-44.07N 155-09.83W, TOP FLOAT 20 METERS. C. 71-40.38N 154-59.98W, TOP FLOAT 19 METERS. 2. CANCEL HYDROARC 271/22. 250551Z OCT 23 HYDROARC 269/23(16). CHUKCHI SEA. DNC 27. SCIENTIFIC MOORING, TOP FLOAT 35 METERS, ESTABLISHED IN 74-31.38N 161-56.54W. 172024Z OCT 23 HYDROARC 259/23(42). KARA SEA. RUSSIA. DNC 22. SHOALS REPORTED: A. 9.4 METERS IN 68-37.33N 073-47.99E. B. 9.5 METERS IN 68-37.25N 073-48.97E. C. 9.5 METERS IN 68-37.13N 073-49.75E. D. 9.5 METERS IN 68-36.13N 073-48.06E. E. 9.4 METERS IN 68-36.68N 073-49.90E. F. 9.6 METERS IN 68-36.32N 073-49.73E. G. 9.4 METERS IN 68-36.26N 073-47.59E. H. 9.2 METERS IN 68-35.99N 073-47.96E. I. 9.1 METERS IN 68-35.72N 073-46.93E. J. 9.6 METERS IN 68-35.67N 073-48.89E. K. 9.6 METERS IN 68-34.52N 073-51.30E. 172024Z OCT 23 HYDROARC 258/23(42). KARA SEA. RUSSIA. DNC 22. SHOALS REPORTED: A. 9.6 METERS IN 68-43.20N 073-54.04E. B. 9.2 METERS IN 68-41.35N 073-50.61E. C. 9.2 METERS IN 68-39.99N 073-54.87E. D. 9.5 METERS IN 68-39.74N 073-48.77E. E. 9.6 METERS IN 68-38.78N 073-50.38E. F. 9.0 METERS IN 68-38.49N 073-49.52E. G. 9.6 METERS IN 68-38.05N 073-50.69E. H. 9.3 METERS IN 68-37.76N 073-48.12E. 130709Z OCT 23 HYDROARC 254/23(41). EAST SIBERIAN SEA. DNC 27. 1. AUTONOMOUS BUOY STATIONS ESTABLISHED IN: A. 74-53.21N 175-33.07E. B. 74-35.06N 173-31.44E. C. 73-16.56N 173-52.60E. ONE MILE BERTH REQUESTED. 2. CANCEL HYDROARC 283/22. 050034Z OCT 23 HYDROARC 243/23(15). CANADA. DNC 28. LIGHTS UNLIT: A. RESOLUTE BAY RANGE FRONT LIGHT 74-41.20N 094-48.00W. B. RESOLUTE BAY RANGE REAR LIGHT 74-41.30N 094-48.00W. 022353Z OCT 23 HYDROARC 240/23(15). LANCASTER SOUND. CANADA. DNC 28. SCIENTIFIC MOORING, TOP FLOAT 30 METERS, ESTABLISHED IN 74-27.83N 090-32.81W. 022345Z OCT 23 HYDROARC 239/23(15). LANCASTER SOUND. CANADA. DNC 28. SCIENTIFIC MOORING, TOP FLOAT 30 METERS, ESTABLISHED IN 74-08.75N 091-02.83W. 220655Z AUG 23 HYDROARC 178/23(42). KARA SEA. RUSSIA. DNC 22. 1. BOTTOM SCIENTIFIC MOORING ESTABLISHED UNTIL FURTHER NOTICE IN 71-33.88N 072-09.40E. 200 METER BERTH REQUESTED. 2. CANCEL HYDROARC 175/23. 150429Z AUG 23 HYDROARC 163/23(15). BEAUFORT SEA. CANADA. DNC 27. RACON AT PULLEN ISLAND LIGHT 69-46.60N 134-24.40W INOPERATIVE. 120245Z AUG 23 HYDROARC 162/23(15). BEAUFORT SEA. CANADA. DNC 27. BALLIE ISLAND RACON RELOCATED TO 70-37.65N 128-15.42W. 090827Z AUG 23 HYDROARC 157/23(16). BEAUFORT SEA. CHUKCHI SEA. ALASKA. DNC 27. SCIENTIFIC MOORINGS ESTABLISHED IN: A. 71-18.16N 155-42.37W. B. 71-22.90N 155-36.16W. C. 71-24.81N 156-26.47W. D. 71-27.43N 156-36.35W. 090818Z AUG 23 HYDROARC 156/23(16). CHUKCHI SEA. ALASKA. DNC 27. SCIENTIFIC MOORINGS ESTABLISHED IN: A. 70-43.82N 160-22.05W. B. 70-40.80N 160-12.69W. C. 70-39.28N 160-06.17W. 090810Z AUG 23 HYDROARC 155/23(16). CHUKCHI SEA. ALASKA. DNC 27. SCIENTIFIC MOORINGS ESTABLISHED IN: A. 68-08.94N 166-01.68W. B. 68-20.82N 166-53.94W. 260812Z SEP 22 HYDROARC 293/22(15). MCCLINTOCK CHANNEL. CANADA. DNC 28. SHOALS REPORTED IN: A. 31.7 METERS, 70-03.31N 097-42.44W. B. 20.9 METERS, 70-03.00N 097-19.39W. C. 20.2 METERS, 69-57.60N 097-58.25W. D. 23.4 METERS, 69-53.97N 097-44.35W. 232220Z SEP 22 HYDROARC 291/22(15). LANCASTER SOUND. CANADA. DNC 28. SCIENTIFIC MOORINGS ESTABLISHED: A. 74-36.37N 091-15.05W, TOP FLOAT 147 METERS. B. 74-36.27N 091-15.73W, TOP FLOAT 59 METERS. C. 74-36.24N 091-15.17W, TOP FLOAT 44 METERS. D. 74-04.85N 090-01.25W, TOP FLOAT 32 METERS. E. 74-12.57N 090-49.64W, TOP FLOAT 246 METERS. F. 74-11.87N 090-49.04W, TOP FLOAT 26 METERS. G. 74-35.73N 091-08.05W, TOP FLOAT 72 METERS. H. 74-12.67N 090-46.24W, TOP FLOAT 61 METERS. I. 74-11.89N 090-46.29W, TOP FLOAT 36 METERS. 082310Z SEP 22 HYDROARC 262/22(15). CANADA. DNC 28. 14 METER SHOAL IN 68-36.32N 095-21.40W. 060434Z SEP 22 HYDROARC 260/22(15). QUEEN MAUD GULF. CANADA. DNC 28. 16 METER SHOAL IN 68-19.50N 100-46.86W. 240904Z AUG 22 HYDROARC 235/22(15). QUEEN MAUD GULF. CANADA. DNC 28. SUB-SURFACE SCIENTIFIC MOORINGS ESTABLISHED: A. 68-39.32N 103-00.52W, TOP FLOAT FOUR METERS. B. 68-39.93N 103-00.88W, TOP FLOAT 20 METERS. C. 68-53.41N 101-31.16W, TOP FLOAT FOUR METERS. 210502Z AUG 22 HYDROARC 228/22(15). CORONATION GULF. CANADA. DNC 28. SCIENTIFIC MOORING, TOP FLOAT 15 METERS BELOW SURFACE, ESTABLISHED IN: A. 67-40.09N 107-57.28W. B. 67-40.36N 107-57.86W. 191804Z AUG 22 HYDROARC 224/22(15). CORONATION GULF. CANADA. DNC 28. SCIENTIFIC MOORING, TOP FLOAT 15 METERS BELOW SURFACE, ESTABLISHED IN 68-20.75N 112-21.12W. 191804Z AUG 22 HYDROARC 223/22(15). CORONATION GULF. CANADA. DNC 28. SCIENTIFIC MOORING, TOP FLOAT 15 METERS BELOW SURFACE, ESTABLISHED IN 67-53.89N 111-21.21W. 111643Z AUG 22 HYDROARC 198/22(15). BEAUFORT SEA. CANADA. DNC 27. RACON AT SHINGLE POINT BEACON 69-00.00N 137-34.50W INOPERATIVE. 250947Z JUL 22 HYDROARC 175/22(42). KARA SEA. DNC 22. SUB-SURFACE SCIENTIFIC MOORING, AT DEPTH 95 METERS, ESTABLISHED UNTIL FURTHER NOTICE IN 73-15.78N 065-32.05E. WIDE BERTH REQUESTED. MSGID/GENADMIN/NGA NAVSAFETY WASHINGTON DC// RMKS/ HYDROARC 208/21(15). QUEEN MAUD GULF. CANADA. DNC 28. 13.7 METER SHOAL IN 69-01.48N 100-58.36W. MSGID/GENADMIN/NGA NAVSAFETY WASHINGTON DC// RMKS/ HYDROARC 207/21(15). QUEEN MAUD GULF. CANADA. DNC 28. 1. 23.8 METER SHOAL IN 68-58.95N 101-08.32W. 2. CANCEL HYDROARC 206/21.