Bulgaria’s Navy Hydrographic Service has now printed an official naval-exercise box south of Cape Kaliakra for a four-hour window on 10 November, not a reprint of Saturday afternoon’s dedicated Varna port-and-road closure and not a second boarding window on Cape Galata. The working primary is the English in-force board on hs-navy.mod.bg, which now starts at NAVWARN 817/26, then 816/26, then NAVWARN 815/26: BLACK SEA. BULGARIA SOUTH OF CAPE KALIAKRA NAVAL EXERCISE FROM 100800 UTC TO 101200 UTC NOV 2026 IN AREA BOUND BY: 43-17.0N 028-38.2E, 43-12.2N 028-38.2E, 43-12.2N 028-17.8E, 43-14.8N 028-17.8E, 43-17.0N 028-24.8E. AREA TEMPORARILY PROHIBITED FOR NAVIGATION, SPORTS, TOURISM, SWIMMING, ANCHORING, FISHING, DIVING AND UNDERWATER ACTIVITIES. Official English has taken 815. This morning’s unused folder correctly left 815 unused until that board moved. Industry coastal reprints and SeaLagom carry the same five corners and the same 100800–101200 UTC 10 November window, first seen 15:06 UTC on 9 November, with minutes expanded as 43-17.00N 028-38.20E. Hold official English 43-17.0N 028-38.2E. Official English and the industry reprint agree on the box and on the naval-exercise tag. That is the product.
That is the working primary. Monday night’s product is a one-window naval-exercise prohibition south of Cape Kaliakra, not a rewrite of Saturday afternoon’s dedicated 799/26 Varna port-and-road closure, not a reprint of Sunday night’s dedicated 813/26 Galata boarding box, and not a conversion of Thursday morning’s dedicated unmanned-tanker file on Mentor onto a Kaliakra exercise polygon. It names south of Cape Kaliakra. It names naval exercise. It names 100800–101200 UTC November 2026. It names five corners. It names a temporary prohibition on navigation, sports, tourism, swimming, anchoring, fishing, diving and underwater activities. It does not name a hull. It does not name an IMO number, a weapon class, a VHF working channel, a numeric berth, a keep-clear in cables, or a cancel DTG beyond the printed window. Saturday afternoon’s dedicated 799/26 remains Varna port and Varna road, 0500–0900 UTC on 10 November and 0800–1200 UTC on 13 November. Sunday night’s dedicated 813/26 remains boarding operations, 0230–0700 UTC on 12 November, four corners south of Cape Galata. Thursday morning’s dedicated 797/26 remains unmanned tanker Mentor, IMO 9340374, at 43-25.1N 028-37.0E. Those products sit on different clocks. Masters who brief Monday night as a Varna harbour move onto Kaliakra, as 813/26 converted into a 10 November exercise, as Mentor enclosed, or as a standing closure of the Bulgarian coast will have merged a four-hour Kaliakra box onto three other series.
What the warning actually printed
The hydrographic text is short and is the working primary. NAVWARN 815/26. Black Sea. Bulgaria. South of Cape Kaliakra. Naval exercise from 100800 UTC to 101200 UTC November 2026 in area bound by: 43-17.0N 028-38.2E, 43-12.2N 028-38.2E, 43-12.2N 028-17.8E, 43-14.8N 028-17.8E, 43-17.0N 028-24.8E. Area temporarily prohibited for navigation, sports, tourism, swimming, anchoring, fishing, diving and underwater activities. Stay with that wording. Official English printed 43-17.0N and 028-38.2E with one decimal on the minutes; do not silently expand them into SeaLagom’s 43-17.00N 028-38.20E on the official line. Official English printed KALIAKRA. The Hydrographic Service printed a cape tag. It printed naval exercise. It printed one clock window. It printed five coordinates. It printed a prohibition list. It did not print a hull name. It did not print an IMO number, an MMSI, a flag, a call sign, or a pennant number. It did not print “missile,” “gunnery,” “mine,” “torpedo,” “boarding,” or “submarine.” It did not print a radius in cables. It did not print a VHF channel, a NOTAM number, or a harbour-master berth. It did not print a wreck buoy. It did not print a cancel DTG of the form CANCEL THIS MSG. The 100800–101200 UTC window is the live clock. Do not invent a five-cable or one-nautical-mile halo around the box. 815/26 prints the five corners as the prohibited region. Do not invent a 10–13 November daily exercise because wrap 806/26, wrap 807/26 and wrap 808/26 print night boxes and cutter 231 across those days. Do not invent a 0500 UTC start from dedicated 799/26. Give the five corners. Give 100800–101200 UTC 10 November. Give the prohibition list.
The geometry is the first briefing fact. The five corners sit south of Cape Kaliakra, on the order of 43-12N to 43-17N, 028-18E to 028-38E, on the seaward face between Kavarna / Kaliakra and the approaches east of Cape Galata, not inside Varna port, not inside Varna Lake, and not on Thursday morning’s dedicated Mentor plot at 43-25.1N 028-37.0E. The box is compact, on the order of five nautical miles north–south by about fifteen nautical miles east–west. The north wall at 43-17.0N sits a few nautical miles south of the cape and on the order of eight nautical miles south of Mentor’s 43-25.1N plot. Wrap 816/26 is a different geometry: east of Cape Galata, seven corners from 43-10.8N 028-03.7E down to 43-00.0N 028-03.7E, same 100800–101200 UTC clock. Wrap 817/26 is a third geometry: Varna Bay, nine points and the coastline around 43-13N 027-59E, same clock. Saturday afternoon’s dedicated 799/26 names Varna port and Varna road and prints no polygon. 815/26 is none of those. Plot the five corners. Keep them prohibited for navigation, sports, tourism, swimming, anchoring, fishing, diving and underwater activities inside 100800–101200 UTC on 10 November. Do not occupy 43-17.0N 028-38.2E as an overflow anchorage during those hours. Do not treat Kavarna, Balchik, Varna, Burgas, Constanta or Midia as closed because a Kaliakra exercise box is prohibited for four hours on 10 November. Do not treat Varna port as closed by 815/26; that harbour instrument remains dedicated 799/26 on 10 November 0500–0900 UTC and 13 November 0800–1200 UTC.
The clock is the second briefing fact. Official English prints FROM 100800 UTC TO 101200 UTC NOV 2026. That is one discrete four-hour window on 10 November, not a continuous 10–13 November shutdown and not dedicated 799/26’s two harbour mornings. A passage plan that treats the Bulgarian coast as closed from 0500 UTC on 10 November through 1200 UTC on 13 November has joined 799/26, 815/26, wrap 816/26, wrap 817/26 and the cutter-231 wraps into a 79-hour fiction. A passage plan that only carries 10 November 0500–0900 UTC because dedicated 799/26 already occupies that morning has dropped the Kaliakra window that opens at 0800 UTC, while 799/26 is still live on the port for the first overlapping hour. A passage plan that only carries 13 November because dedicated 799/26 already occupies that morning has merged a port-and-road closure onto a seaward Kaliakra box. Hold 100800–101200 UTC 10 November. Do not invent a 0500 UTC start from 799/26. Do not invent a 0230 UTC start from 813/26. Do not invent a night window as a hydrographic all-clear; 815/26 does not print 0000–0800 UTC as a safe corridor, and it does not print the hours after 1200 UTC as a numbered all-clear of the same five corners either. What it prints is the four-hour prohibition. Dedicated 799/26 still occupies Varna port and Varna road 0500–0900 UTC on the same morning. Wrap 816/26 and wrap 817/26 occupy their own polygons 0800–1200 UTC on the same morning. Three products, three boxes, one overlapping clock. They are not a merger.
The missing hull, weapon, radius, VHF and cancel-DTG lines are omissions, not a completed exercise order. Official English 816/26 on the same board prints a naval exercise east of Cape Galata, same 100800–101200 UTC window, seven corners, temporarily prohibited for navigation, anchoring, fishing, diving and underwater activities — no sports, tourism or swimming on that prohibition list. Official English 817/26 prints a naval exercise in Varna Bay, same clock, nine points and the coastline, same broader prohibition list as 815/26. The Black Sea Maritime Coordination Element page groups 815, 816 and 817 as the 10 November prohibited set. That grouping is wrap colour on tonight’s 815/26, not a second dedicated instrument and not a weapon class restored onto 815/26. Wrap 800/26 through 814/26 remain wrap. They do not amend 815/26 into a Galata boarding, a Varna port closure, a lake radius, or a cutter survey. Do not restore a weapon class onto a naval-exercise sentence that prints none. Do not invent Channel 16 as a range-safety net. Do not invent a numeric berth in Varna East or Kavarna. Give the cape, the exercise tag, the window, the five corners, and the prohibition list.
The industry first-seen stamp is 15:06 UTC on 9 November, with a 17:45 UTC update on the SeaLagom card. Official English now leads. Do not wait on a later Bulgarian-language reprint before logging the Kaliakra box. This morning’s unused folder held 815/26 until official hs-navy.mod.bg took it. Monday night is the dedicated conversion, not a restatement of that unused hold. The Bulgarian in-force board retrieved this run still opened at НАВИМ № 814/08.11.2026 г.; English has taken 817, 816 and 815. Hold official English as the working primary.
What this is not, and the same-coast hydrographic colour
This is not a rewrite of NAVWARN 816/26, and it is not Cape Galata moved to Kaliakra. Official English now carries 816/26 immediately above 815/26: BLACK SEA. BULGARIA EAST OF CAPE GALATA NAVAL EXERCISE FROM 100800 UTC TO 101200 UTC NOV 2026 IN AREA BOUND BY: 43-10.8N 028-03.7E, 43-14.8N 028-17.8E, 43-12.2N 028-17.8E, 43-08.0N 028-15.2E, 43-08.0N 028-10.6E, 43-00.0N 028-10.6E, 43-00.0N 028-03.7E. AREA TEMPORARILY PROHIBITED FOR NAVIGATION, ANCHORING, FISHING, DIVING AND UNDERWATER ACTIVITIES. That seven-corner box sits west of tonight’s Kaliakra polygon and shares the 43-12.2N 028-17.8E / 43-14.8N 028-17.8E wall with it. Same clock. Different cape. Different prohibition list. 816/26 is wrap on tonight’s 815/26, unused as a second dedicated 10 November exercise piece. A master shaping 43-10.8N 028-03.7E at 0800 UTC on 10 November still owes 816/26 the seven corners. A master shaping 43-17.0N 028-38.2E still owes 815/26 the five-corner box. Those can be the same morning. They are not the same product. Do not brief Monday night as “Galata opened on Kaliakra.” Do not apply 816/26’s south wall at 43-00.0N to 815/26. Do not drop 816/26 because 815/26 exists.
This is not a rewrite of NAVWARN 817/26, and it is not Varna Bay converted into a Kaliakra box. Official English now starts at 817/26: BLACK SEA. BULGARIA VARNA BAY NAVAL EXERCISE FROM 100800 UTC TO 101200 UTC NOV 2026 IN AREA BOUND BY: 43-13.158N 027-58.897E, 43-12.975N 027-58.897E, 43-12.845N 027-58.897E, 43-12.733N 027-59.139E, 43-12.666N 027-59.681E, 43-12.666N 027-59.914E, 43-12.833N 028-00.289E, 43-13.066N 028-00.289E, 43-13.125N 028-00.289E AND THE COASTLINE. AREA TEMPORARILY PROHIBITED FOR NAVIGATION, SPORTS, TOURISM, SWIMMING, ANCHORING, FISHING, DIVING AND UNDERWATER ACTIVITIES. That nine-point-and-coastline box sits on Varna Bay, west of Cape Galata, on the order of 027-59E. 815/26 names neither Varna Bay nor 027-58.897E. 817/26 is wrap on tonight’s 815/26, unused as a second dedicated 10 November harbour piece and unused as a rewrite of dedicated 799/26. A 10 November overlap is not a merger: 799/26 occupies Varna port and Varna road 0500–0900 UTC; 817/26 occupies a Varna Bay polygon 0800–1200 UTC; 815/26 occupies the Kaliakra polygon 0800–1200 UTC. Do not brief Monday night as “799 added a polygon.” Do not drop 799/26 because 817/26 exists.
This is not a rewrite of NAVWARN 799/26, and it is not Varna port closed from 0800 UTC on 10 November. Saturday afternoon’s dedicated piece remains: Varna Bay, navy training, 0500–0900 UTC on 10 November and 0800–1200 UTC on 13 November, Varna port and Varna road temporarily prohibited for manoeuvring, entrance and exit, swimming, anchoring, sports, entertainment, tourism and diving. 799/26 names neither Cape Kaliakra nor 43-17.0N. 815/26 names neither the port nor the road. A 10 November Kaliakra box is not a third harbour window and not an extension of 799/26 past 0900 UTC. Do not brief Monday night as “799 added 0800–1200 UTC on 10 November.” Do not drop 799/26 because 815/26 exists. Hold 0500–0900 UTC 10 November and 0800–1200 UTC 13 November on the port. Hold 0800–1200 UTC 10 November on the Kaliakra box.
This is not a rewrite of NAVWARN 813/26, and it is not the Galata boarding box moved east and brought forward two days. Sunday night’s dedicated piece remains: south of Cape Galata, boarding operations, 0230–0700 UTC on 12 November, four corners around 43-07.983N 027-56.316E, prohibited for navigation, anchoring, fishing, diving and any type of underwater activity. 813/26 names neither Cape Kaliakra nor 10 November. 815/26 names neither boarding nor 12 November. Official English 814/26 remains wrap on dedicated 813/26: Varna Lake, boarding operations, 0200–0700 UTC on 12 November, region WITN center 43-11.65N 027-50.80E, radius 3 cables. Official wording keeps WITN. Do not brief Monday night as “813 opened on 10 November.” Do not apply 814/26’s three cables to 815/26.
This is not a rewrite of NAVWARN 797/26, and it is not Mentor enclosed. Thursday morning’s dedicated piece remains: unmanned tanker Mentor, IMO 9340374, 43-25.1N 028-37.0E, 1435 UTC 4 November, drifting south three knots, without lights, no crew, increased caution, report MRCC-Varna on visual contact. That plot sits on the order of eight nautical miles north of tonight’s north wall at 43-17.0N 028-38.2E. 815/26 names neither Mentor nor 43-25.1N. Do not brief Monday night as “the unmanned tanker is now inside an exercise box.” Do not drop 797/26 because 815/26 exists. Mentor remains a drifting-hull caution. 815/26 is a four-hour prohibited polygon south of the cape.
This is not a rewrite of NAVWARN 808/26 or 807/26, and it is not cutter 231. Wrap 808/26 remains hydrographic cutter 231, hydrological expedition, 0630–1415 UTC from 10 to 13 November, three-cable distance, Varna Bay. Wrap 807/26 remains cutter 231 east of Cape Galata, 0600–1500 UTC 10–13 November, four-corner prohibited box around 43-10.5N 028-00E, RAM on outboard and autonomous underwater equipment. Those cutter products are not 815/26. Do not invent cutter 231, a three-cable berth, or RAM onto a naval-exercise prohibition that prints none of those lines. Dedicated 777/26 remains cutter 331, now past 061600 UTC 6 November.
This is not a rewrite of NAVWARN 789/26, and it is not Akademik unlit on Kaliakra. Wednesday 4 November’s dedicated piece remains: research vessel Akademik, 0500 UTC 4 November to 1700 UTC 30 November, internal waters and territorial sea of Bulgaria, CTD sampling, keep a safety distance of 1 NM from the vessel. 815/26 prints neither Akademik nor a one-nautical-mile ship berth. Do not apply 789/26’s mile to the five-corner box.
Same-board wrap, unused as dedicated this run and not an 815/26 amendment except as already stated for 816/26 and 817/26: official English 800/26, mine countermeasure, 0700–1000 UTC 10 November, within five cables of 43-10.1N 028-03.8E. 801/26, mine countermeasure, 0630–1500 UTC 10 November, six corners east of Cape Galata. 802/26, mine countermeasure, 0800–1300 UTC 10–12 November, five corners south of Cape Galata. 803/26, mine countermeasure, 0700–1300 UTC 10–12 November, four corners south of Cape Galata. 804/26 and 805/26, artillery firing, 1000–1330 UTC 10 November, east of Cherny Nos. 806/26, navy training, night boxes southwest of Cape Kaliakra, 10–13 November. 809/26, gunnery, 110500–110800 UTC, southwest of Cape Kaliakra. 810/26 and 811/26, mine countermeasures, 11–13 November, southwest of Cape Kaliakra. 812/26, diving, 11 and 12 November, same four corners as dedicated 813/26. 813/26 remains Sunday night’s dedicated Galata boarding. 814/26 remains wrap on 813/26. Carry 815/26 as the Kaliakra 10 November instrument. Carry 816/26 and 817/26 as wrap on this file, not as a second dedicated 10 November piece and not as a weapon class restored onto 815/26. Carry 800–814 as previously wrapped, not as a rewrite of dedicated 799/26 or dedicated 813/26.
The BSMCE “IMPORTANT NAVIGATIONAL WARNINGS FOR 10 NOVEMBER 2026” line that groups 815/09.11.2026, 816/09.11.2026 and 817/09.11.2026 is wrap colour on tonight’s 815/26. It does not add a hull, a weapon class, a radius or a cancel DTG to 815/26. It does not close Varna, Kavarna, Balchik, Burgas, Constanta or Midia. Dedicated 775/26 remains the two-hour e-mail into Bulgarian territorial sea. Do not convert the BSMCE grouping into a 10 November coastal shutdown.
Operational implications
For a master inbound to Varna, Kavarna, Balchik or Constanta, shifting between the Kaliakra face and the Galata approaches, or transiting Bulgarian territorial sea on 10 November, 815/26 is a four-hour seaward plot amendment before it is an exercise story. The five corners sit in a compact box on the order of five by fifteen nautical miles south of Cape Kaliakra. The notice names naval exercise. It does not print a vertical limit, a lighting scheme, a VHF working channel, a named firing unit, or a numeric berth. Area temporarily prohibited is the whole instruction, with a hard window of 100800–101200 UTC on 10 November. A passage plan that treats 43-17.0N 028-38.2E as closed after 1200 UTC on 10 November without a replacement NAVWARN has over-read a four-hour box. A passage plan that only annotates “exercise, Kaliakra” without the five corners has under-read a numbered NAVWARN that exists to be plotted.
799/26 is the second 10 November problem on the same coast, and it is the wrong one to drop. Saturday afternoon’s dedicated port-and-road closure still occupies Varna port and Varna road 0500–0900 UTC on 10 November. Wrap 817/26 occupies a Varna Bay polygon 0800–1200 UTC. Wrap 816/26 occupies the Galata-east polygon 0800–1200 UTC. Hulls working the Bulgarian coast that morning need all four numbers. Do not assume Varna port is idle after 0900 UTC because 815/26 is the new top English row. Do not assume the Kaliakra box is idle because the fixture is “only a Constanta wait.” The Hydrographic Service issued a new number against the cape, not a cancellation of the harbour instrument.
For DPAs with Varna, Kavarna, Constanta, Midia, Burgas or western Black Sea stems on 10–13 November, the operational question is whether the planned track clips the five-corner list inside 0800–1200 UTC on 10 November, not whether Bulgaria “closed the coast.” 815/26 does not close Varna. It does not close Kavarna. It does not close Constanta. It does not cancel 799/26, 813/26, 797/26 or 789/26. A fixture that only budgeted Saturday afternoon’s port-and-road windows, Sunday night’s Galata boarding, or Thursday morning’s Mentor plot has not budgeted a four-hour prohibited polygon south of Cape Kaliakra on 10 November. Dedicated 166/26 remains the 12–13 November Midia prohibited firing box. Dedicated 201/26 remains the 9–13 November Zakynthos firing box. Those clocks are separate.
Do not recast 9 November as a Bulgarian coastal shutdown, a Mentor enclosure, a rewrite of 799/26, a rewrite of 813/26, or a 10–13 November merger. The confirmed facts are NAVWARN 815/26, south of Cape Kaliakra, naval exercise, 100800–101200 UTC 10 November, five corners, area temporarily prohibited for navigation, sports, tourism, swimming, anchoring, fishing, diving and underwater activities, with 816/26 and 817/26 the same-clock wrap and dedicated 799/26 still in force on the same 10 November morning.
What Operators Should Note
- Log 815/26 as a four-hour Kaliakra naval-exercise box, not as a coastal shutdown and not as a Varna harbour move. NAVWARN 815/26. Official English on hs-navy.mod.bg. Black Sea. Bulgaria. South of Cape Kaliakra. Naval exercise from 100800 UTC to 101200 UTC November 2026 in area bound by: 43-17.0N 028-38.2E / 43-12.2N 028-38.2E / 43-12.2N 028-17.8E / 43-14.8N 028-17.8E / 43-17.0N 028-24.8E. Area temporarily prohibited for navigation, sports, tourism, swimming, anchoring, fishing, diving and underwater activities. Hold official English 43-17.0N 028-38.2E. The notice names neither hull, IMO, weapon class, VHF, numeric berth, radius nor CANCEL THIS MSG. This is not 799/26, not 813/26, not 797/26, not 816/26 as a dedicated second piece, and not a 10–13 November shutdown.
- Plot one compact 43-17N polygon south of the cape, not Varna port and not Mentor. The five corners sit about 5 by 15 nautical miles south of Cape Kaliakra. Do not slide the box west onto dedicated 813/26’s Galata corners. Do not slide it north onto Mentor at 43-25.1N 028-37.0E. Do not invent a VHF working channel, a numeric berth, a weapon class or a night suspension. Wrap 816/26 remains east of Cape Galata, seven corners, same 0800–1200 UTC clock, unused as dedicated. Wrap 817/26 remains Varna Bay, nine points and the coastline, same clock, unused as dedicated and unused as a rewrite of 799/26.
- Give the printed window, then kill the watch. 100800–101200 UTC 10 November. One discrete four-hour window. Do not treat the box as until further notice. Do not drop it at dusk on 9 November. Do not keep avoiding 43-17.0N 028-38.2E after 1200 UTC 10 November without a replacement NAVWARN. Do not invent 0500 UTC from 799/26 or 0230 UTC from 813/26. Dedicated 799/26 still occupies Varna port and Varna road 0500–0900 UTC on the same morning and 0800–1200 UTC on 13 November.
- Keep 816/26, 817/26 and 800–814 off a second dedicated folder. Official English now starts at 817/26 then 816/26 then 815/26 above dedicated 813/26. Carry 816 and 817 as wrap on tonight’s 815/26. Carry 800–812 as wrap on dedicated 799/26. Carry 814/26 as wrap on dedicated 813/26. The BSMCE 10 November grouping of 815, 816 and 817 is wrap colour, not a coastal closure. Dedicated 775/26 remains the two-hour e-mail.
- Keep Mentor, Akademik, the Galata boarding and the Midia firing on their own files. 797/26 remains dedicated unmanned tanker Mentor, IMO 9340374, 43-25.1N 028-37.0E. 789/26 remains dedicated Akademik through 1700 UTC 30 November. 813/26 remains dedicated Galata boarding 0230–0700 UTC 12 November. 799/26 remains dedicated Varna port and road. 166/26 remains dedicated Midia prohibited firing 0700–1300 UTC 12–13 November. This morning’s 537/26 Tango 833A, this morning’s IMO 130-count on Vieila, and Sunday night’s Update 112 remain their own dedicated files. UKMTO still ends at dedicated 200-26. No 201-26, no Update 113, no IMO 131 board row and no ARN 169 this run.
- Varna, Kavarna, Balchik, Burgas, Constanta and Midia are not closed by this notice. Kaliakra-face traffic now carries a five-corner prohibited polygon for four hours on 10 November, with dedicated 799/26 still occupying the port that morning and wrap 816/26 and 817/26 occupying their own same-clock boxes. Watch a later NAVWARN that moves 43-17.0N 028-38.2E, amends 100800–101200 UTC 10 November, adds a hull / weapon class / radius / VHF / CANCEL DTG, or extends past 1200 UTC 10 November — not a 10–13 November merger, not a Mentor enclosure, and not a Varna harbour rewrite.
Regulas Shipping will keep lining NAVWARN 815/26 against the still-in-force 799/26 Varna port-and-road windows and against Sunday night’s dedicated 813/26 Galata boarding so operators can treat the Kaliakra exercise as a numbered four-hour 10 November prohibition, not as a coastal shutdown or a harbour move.
