Kiri
| Dokumendiregister | Transpordiamet |
| Viit | 6.1-2/25/10633-1 |
| Registreeritud | 25.06.2025 |
| Sünkroonitud | 26.06.2025 |
| Liik | Sissetulev kiri |
| Funktsioon | 6.1 Navigatsiooni korraldamine |
| Sari | 6.1-2 Kirjavahetus veeteede ja navigatsioonimärgistuse küsimustes |
| Toimik | 6.1-2/2025 |
| Juurdepääsupiirang | Avalik |
| Juurdepääsupiirang | |
| Adressaat | 3BIRD OÜ |
| Saabumis/saatmisviis | 3BIRD OÜ |
| Vastutaja | Kert Süsmalainen (Users, Merendusteenistus, Laevateede ja sadamate osakond) |
| Originaal | Ava uues aknas |
Failid
3BIRD OÜ, Lõõtsa tn 5 , 11415 Tallinn, reg code: 16165329 ANNEX NO. 1. THE PLAN FOR THE PLACEMENT OF SIGNAL BUOYS
1. Description of planned activities
In order to carry out surveys at the planned wind farm, 4 signal buoys will need to be positioned
at sea.
The signal buoys will be constructed and anchored according to the attached diagram (Figure 2).
The coordinates of the buoy locations are shown in Table 1 and on Figure 1.
The signal buoys will be used to mark points along the lines of migratory bird observation (so-
called transect lines). Ornithologists conducting ornithological observations will record bird
flights that cross the line between the vessel anchorage and the line marked by the signal buoys.
The signal buoys will also be used to precisely measure the distance from the vessel of the
passing birds.
Signal buoys will be fitted with a radar reflector (aluminium without colour) and a yellow flag,
the mooring buoy will be orange. The LED lights will emit a yellow light with a blink frequency of
1 second (60 times per minute).
The signal buoys will be placed in the locations indicated in the Table 1 before the first survey
session at each research season (autumn and spring migration) and collected after the end of
research in a given season:
✓ placement of buoys in the autumn season of 2025 – before the research session
planned for 15–31 July 2025
✓ collection of buoys in the autumn season of 2025 – shortly after the last research
session planned for 15–30 November 2025
✓ placement of buoys in the spring season of 2026 – before the research session planned
for 01–15 March 2026
✓ collection of buoys in the spring season of 2026 – shortly after the last research session
planned for 15–31 May 2026
✓ placement of buoys in the autumn season of 2026 – before the research session
planned for 15–31 July 2026
✓ collection of buoys in the autumn season of 2026 – shortly after the last research
session planned for 15–30 November 2026
✓ placement of buoys in the spring season of 2027 – before the research session planned
for 01–15 March 2027
✓ collection of buoys in the spring season of 2027 – shortly after the last research session
planned for 15–31 May 2027
The planned dates for the surveys are shown in Table 2
3BIRD OÜ, Lõõtsa tn 5 , 11415 Tallinn, reg code: 16165329 ANNEX NO. 1. THE PLAN FOR THE PLACEMENT OF SIGNAL BUOYS
2. Anchoring system
The signal buoys will be anchored to the bottom using a metal block weighing approximately 50-
70 kg. The signal buoy will be connected to the anchor using two sections of rope and one section
of steel chain. The steel chain will ensure that the section of rope directly below the water
surface is vertical. The signal buoy will extend 2m above the water surface.
The total length of the signal buoy is 4m.
Table 1 Radar survey points and signal buoy deployment coordinates
POINT NAME POINT TYPE Coordinates (X) Coordinates (Y)
EE01R vessel anchoring 21° 47.873' E 58° 1.012' N
S01 transect signal buoy 21° 47.861' E 58° 0.473' N
S02 transect signal buoy 21° 47.849' E 57° 59.934' N
W01 transect signal buoy 21° 46.857' E 58° 1.018' N
W02 transect signal buoy 21° 45.842' E 58° 1.024' N
Figure 1. Vessel anchor position and visual observation transects with the location of buoys in the survey area
3BIRD OÜ, Lõõtsa tn 5 , 11415 Tallinn, reg code: 16165329 ANNEX NO. 1. THE PLAN FOR THE PLACEMENT OF SIGNAL BUOYS
Figure 2: Construction and anchoring of signal buoys
Mooring buoy
Flag
Radar reflector with SOLAS reflective tape strips
Aluminium tube (Diameter 40 mm x width 2 mm)
Two Styrodur floats
Metal anchor / Metal block (50-70 kg)
Steel rope (Diameter 10 mm)
Steel chain (Length 1 m)
Steel weight / balast (Diameter 60 mm)
Height 2 m above water level
LED signal light
3BIRD OÜ, Lõõtsa tn 5 , 11415 Tallinn, reg code: 16165329 ANNEX NO. 1. THE PLAN FOR THE PLACEMENT OF SIGNAL BUOYS
Table 2. Planned work schedule of the survey
Date from Date to Number of survey days
2025-07-15 2025-07-31 4 days
2025-08-01 2025-08-31 7 days (not consecutive, minimum 2 cruises)
2025-09-01 2025-09-30 7 days (not consecutive, minimum 2 cruises)
2025-10-01 2025-10-31 7 days (not consecutive, minimum 2 cruises)
2025-11-01 2025-11-30 7 days (not consecutive, minimum 2 cruises)
2026-03-01 2026-03-31 7 days (not consecutive, minimum 2 cruises)
2026-04-01 2026-04-30 7 days (not consecutive, minimum 2 cruises)
2026-05-01 2026-05-31 7 days (not consecutive, minimum 2 cruises)
2026-07-15 2026-07-31 4 days
2026-08-01 2026-08-31 7 days (not consecutive, minimum 2 cruises)
2026-09-01 2026-09-30 7 days (not consecutive, minimum 2 cruises)
2026-10-01 2026-10-31 7 days (not consecutive, minimum 2 cruises)
2026-11-01 2026-11-30 7 days (not consecutive, minimum 2 cruises)
2027-03-01 2027-03-31 7 days (not consecutive, minimum 2 cruises)
2027-04-01 2027-04-30 7 days (not consecutive, minimum 2 cruises)
2027-05-01 2027-05-31 7 days (not consecutive, minimum 2 cruises)
25.06.2025
3BIRD OÜ
Lõõtsa tn 5
11415 Tallinn
reg code: 16165329
Estonian Transport Administration
Waterways and Ports Department
Maritime Division
Valge 4
Tallinn 11413
Application for the installation of buoys
In connection with the “Bird study for Estonian-Latvian offshore wind farm project (ELWIND)”
LOT 1 “ Estonian study area”, we wish to install marker buoys (not navigation buoys) in the
planned wind farm area for bird radar monitoring. The aim of the bird survey is to collect data
on migratory birds in the area by recording their movement (migration, foraging, flights
between feeding and resting grounds etc.). The research is aimed at obtaining the data
required to assess the impact of planned wind farm on bird populations, on the order of
Environmental Investment Centre Foundation.
Work will commence on 15 July 2025 and end on 31 May 2027, with winter breaks from 1
December to 28 February each year of study.
The locations of the buoys to be installed are shown in the Annex (Table 1 and Figure 1). The
systems located at one location consist of four buoys, which extend 2 m above sea level and
are equipped with LED lights and reflectors. A more detailed marking buoy diagram is provided
in Figure 2 of the Annex 1.
We wish to install the buoys in the sea from 15 July 2025. We kindly request for a permit for
the installation of the buoys described above in the sea.
Yours sincerely
Dear Sir/Madam,
On behalf of 3BIRD OÜ, I would like to kindly request the possibility of installing a buoys for bird migration monitoring as a part of the pre-investement study of the offshore wind farm area. Please find attached the application with appendix.
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3BIRD OÜ, Lõõtsa tn 5 , 11415 Tallinn, reg code: 16165329 ANNEX NO. 1. THE PLAN FOR THE PLACEMENT OF SIGNAL BUOYS
1. Description of planned activities
In order to carry out surveys at the planned wind farm, 4 signal buoys will need to be positioned
at sea.
The signal buoys will be constructed and anchored according to the attached diagram (Figure 2).
The coordinates of the buoy locations are shown in Table 1 and on Figure 1.
The signal buoys will be used to mark points along the lines of migratory bird observation (so-
called transect lines). Ornithologists conducting ornithological observations will record bird
flights that cross the line between the vessel anchorage and the line marked by the signal buoys.
The signal buoys will also be used to precisely measure the distance from the vessel of the
passing birds.
Signal buoys will be fitted with a radar reflector (aluminium without colour) and a yellow flag,
the mooring buoy will be orange. The LED lights will emit a yellow light with a blink frequency of
1 second (60 times per minute).
The signal buoys will be placed in the locations indicated in the Table 1 before the first survey
session at each research season (autumn and spring migration) and collected after the end of
research in a given season:
✓ placement of buoys in the autumn season of 2025 – before the research session
planned for 15–31 July 2025
✓ collection of buoys in the autumn season of 2025 – shortly after the last research
session planned for 15–30 November 2025
✓ placement of buoys in the spring season of 2026 – before the research session planned
for 01–15 March 2026
✓ collection of buoys in the spring season of 2026 – shortly after the last research session
planned for 15–31 May 2026
✓ placement of buoys in the autumn season of 2026 – before the research session
planned for 15–31 July 2026
✓ collection of buoys in the autumn season of 2026 – shortly after the last research
session planned for 15–30 November 2026
✓ placement of buoys in the spring season of 2027 – before the research session planned
for 01–15 March 2027
✓ collection of buoys in the spring season of 2027 – shortly after the last research session
planned for 15–31 May 2027
The planned dates for the surveys are shown in Table 2
3BIRD OÜ, Lõõtsa tn 5 , 11415 Tallinn, reg code: 16165329 ANNEX NO. 1. THE PLAN FOR THE PLACEMENT OF SIGNAL BUOYS
2. Anchoring system
The signal buoys will be anchored to the bottom using a metal block weighing approximately 50-
70 kg. The signal buoy will be connected to the anchor using two sections of rope and one section
of steel chain. The steel chain will ensure that the section of rope directly below the water
surface is vertical. The signal buoy will extend 2m above the water surface.
The total length of the signal buoy is 4m.
Table 1 Radar survey points and signal buoy deployment coordinates
POINT NAME POINT TYPE Coordinates (X) Coordinates (Y)
EE01R vessel anchoring 21° 47.873' E 58° 1.012' N
S01 transect signal buoy 21° 47.861' E 58° 0.473' N
S02 transect signal buoy 21° 47.849' E 57° 59.934' N
W01 transect signal buoy 21° 46.857' E 58° 1.018' N
W02 transect signal buoy 21° 45.842' E 58° 1.024' N
Figure 1. Vessel anchor position and visual observation transects with the location of buoys in the survey area
3BIRD OÜ, Lõõtsa tn 5 , 11415 Tallinn, reg code: 16165329 ANNEX NO. 1. THE PLAN FOR THE PLACEMENT OF SIGNAL BUOYS
Figure 2: Construction and anchoring of signal buoys
Mooring buoy
Flag
Radar reflector with SOLAS reflective tape strips
Aluminium tube (Diameter 40 mm x width 2 mm)
Two Styrodur floats
Metal anchor / Metal block (50-70 kg)
Steel rope (Diameter 10 mm)
Steel chain (Length 1 m)
Steel weight / balast (Diameter 60 mm)
Height 2 m above water level
LED signal light
3BIRD OÜ, Lõõtsa tn 5 , 11415 Tallinn, reg code: 16165329 ANNEX NO. 1. THE PLAN FOR THE PLACEMENT OF SIGNAL BUOYS
Table 2. Planned work schedule of the survey
Date from Date to Number of survey days
2025-07-15 2025-07-31 4 days
2025-08-01 2025-08-31 7 days (not consecutive, minimum 2 cruises)
2025-09-01 2025-09-30 7 days (not consecutive, minimum 2 cruises)
2025-10-01 2025-10-31 7 days (not consecutive, minimum 2 cruises)
2025-11-01 2025-11-30 7 days (not consecutive, minimum 2 cruises)
2026-03-01 2026-03-31 7 days (not consecutive, minimum 2 cruises)
2026-04-01 2026-04-30 7 days (not consecutive, minimum 2 cruises)
2026-05-01 2026-05-31 7 days (not consecutive, minimum 2 cruises)
2026-07-15 2026-07-31 4 days
2026-08-01 2026-08-31 7 days (not consecutive, minimum 2 cruises)
2026-09-01 2026-09-30 7 days (not consecutive, minimum 2 cruises)
2026-10-01 2026-10-31 7 days (not consecutive, minimum 2 cruises)
2026-11-01 2026-11-30 7 days (not consecutive, minimum 2 cruises)
2027-03-01 2027-03-31 7 days (not consecutive, minimum 2 cruises)
2027-04-01 2027-04-30 7 days (not consecutive, minimum 2 cruises)
2027-05-01 2027-05-31 7 days (not consecutive, minimum 2 cruises)
25.06.2025
3BIRD OÜ
Lõõtsa tn 5
11415 Tallinn
reg code: 16165329
Estonian Transport Administration
Waterways and Ports Department
Maritime Division
Valge 4
Tallinn 11413
Application for the installation of buoys
In connection with the “Bird study for Estonian-Latvian offshore wind farm project (ELWIND)”
LOT 1 “ Estonian study area”, we wish to install marker buoys (not navigation buoys) in the
planned wind farm area for bird radar monitoring. The aim of the bird survey is to collect data
on migratory birds in the area by recording their movement (migration, foraging, flights
between feeding and resting grounds etc.). The research is aimed at obtaining the data
required to assess the impact of planned wind farm on bird populations, on the order of
Environmental Investment Centre Foundation.
Work will commence on 15 July 2025 and end on 31 May 2027, with winter breaks from 1
December to 28 February each year of study.
The locations of the buoys to be installed are shown in the Annex (Table 1 and Figure 1). The
systems located at one location consist of four buoys, which extend 2 m above sea level and
are equipped with LED lights and reflectors. A more detailed marking buoy diagram is provided
in Figure 2 of the Annex 1.
We wish to install the buoys in the sea from 15 July 2025. We kindly request for a permit for
the installation of the buoys described above in the sea.
Yours sincerely
