Sea of Marmara
IHO sea area 29 · 26° to 30° E, 40° to 41° N
- in force
- 0
- last 12 months
- 1
- archive messages
- 121
- categories
- 8
What the archive shows
121 messages are recorded since 1979-11-15 for the Sea of Marmara. The selection uses the IHO sea area; a message may describe an exercise, equipment outage or continuing operation as well as a hazard report.
Cable ops, Surveys tie for the largest recorded count, with 44 messages each.
The NGA historical archive froze in 2024-05; live collection began 2026-08-17. Counts around that gap are incomplete, and changes in reporting volume do not establish changes in incident frequency.
In force now · 0
Nothing in force in this sea right now.
By year
79
99
00
02
03
05
06
07
08
09
10
11
12
13
14
16
17
18
19
20
21
22
25
26
By month (all years)
J
F
M
A
M
J
J
A
S
O
N
D
By category · available archive
| Surveys | 44 | 36% |
| Cable ops | 44 | 36% |
| Other | 13 | 11% |
| Exercises | 10 | 8% |
| Quakes | 5 | 4% |
| Restricted | 3 | 2% |
| Towing | 1 | 1% |
| Spills | 1 | 1% |
Archive · 121 cancelled
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.