VesselAlert
Name: THEODORUS
MMSI: 244989840
Callsign: PA3981
Type: Sailing
Flag: Netherlands
Seen: 06-Apr-2026 17:41:17 CEST
Speed: 0.1 kts
Distance: 16.4 nm
Signal RSSI: -27.6 dBFS
Ship AIS VesselAlert © kx1t - link
VesselAlert
Name: THEODORUS
MMSI: 244700862
Callsign: PC5942
Type: Dredging
Flag: Netherlands
Seen: 05-Mar-2026 01:03:43 CET
Speed: 0.0 kts
Dest.: ELBE
Distance: 64.7 nm
Signal RSSI: 0.0 dBFS
Ship AIS VesselAlert © kx1t - link
VesselAlert
Name: THEODORUS
MMSI: 244700862
Callsign: PC5942
Type: Dredging
Flag: Netherlands
Seen: 11-Feb-2026 11:07:06 CET
Speed: 0.1 kts
Dest.: ELBE
Distance: 64.6 nm
Signal RSSI: 0.0 dBFS
Ship AIS VesselAlert © kx1t - link
VesselAlert
Name: THEODORUS
MMSI: 244700862
Callsign: PC5942
Type: Dredging
Flag: Netherlands
Seen: 05-Feb-2026 15:31:56 CET
Speed: 0.0 kts
Dest.: ELBE
Distance: 64.6 nm
Signal RSSI: 0.0 dBFS
Ship AIS VesselAlert © kx1t - link
VesselAlert NEW FIRST Observation
Name: THEODORUS
MMSI: 244700862
Callsign: PC5942
Type: Dredging
Flag: Netherlands
Seen: 29-Jan-2026 05:46:02 CET
Status: moored
Dest.: ELBE
Distance: 63.4 nm
Signal RSSI: 0.0 dBFS
Ship AIS VesselAlert © kx1t - link
VesselAlert
Name: THEODORUS
MMSI: 244700862
Callsign: PC5942
Flag: Netherlands
Seen: 28-Jan-2026 21:01:52 CET
Status: moored
Speed: 1.5 kts
Dest.: ELBE
Distance: 63.3 nm
Signal RSSI: 0.0 dBFS
Ship AIS VesselAlert © kx1t - link
A spiral made of right triangles of increasing size somewhat resembles a nautilus or snail shell. Outlined in black ink and filled with watercolor, the triangles are alternating blue and pink, with three yellow triangles interspersed.
I've got one more #mathober post - today's prompt is "recursion", and this by-hand construction of the Spiral of Theodorus seems sort of recursive. Just keep adding triangles over and over. The length of the hypotenuses are the square roots of 2 through 17 […]
[Original post on universeodon.com]
VesselAlert
Name: THEODORUS
MMSI: 244989840
Callsign: PA3981
Type: Sailing
Flag: Netherlands
Seen: 14-Aug-2025 20:32:11 CEST
Speed: 3.5 kts
Distance: 22.7 nm
Signal RSSI: -17.4 dBFS
Ship AIS VesselAlert © kx1t - link
VesselAlert
Name: THEODORUS
MMSI: 244989840
Callsign: PA3981
Type: Sailing
Flag: Netherlands
Seen: 12-Aug-2025 14:48:57 CEST
Speed: 5.4 kts
Distance: 16.2 nm
Signal RSSI: -20.1 dBFS
Ship AIS VesselAlert © kx1t - link
VesselAlert
Name: THEODORUS
MMSI: 244989840
Callsign: PA3981
Type: Sailing
Flag: Netherlands
Seen: 11-Aug-2025 15:20:57 CEST
Distance: 15.2 nm
Signal RSSI: -27.2 dBFS
Ship AIS VesselAlert © kx1t - link
VesselAlert
Name: THEODORUS
MMSI: 244989840
Callsign: PA3981
Type: Sailing
Flag: Netherlands
Seen: 11-Aug-2025 15:00:35 CEST
Speed: 3.6 kts
Distance: 15.2 nm
Signal RSSI: -27.9 dBFS
Ship AIS VesselAlert © kx1t - link
VesselAlert
Name: THEODORUS
MMSI: 244989840
Callsign: PA3981
Type: Sailing
Flag: Netherlands
Seen: 11-Aug-2025 15:00:55 CEST
Speed: 3.6 kts
Distance: 15.2 nm
Signal RSSI: -27.9 dBFS
Ship AIS VesselAlert © kx1t - link
VesselAlert
Name: THEODORUS
MMSI: 244989840
Callsign: PA3981
Type: Sailing
Flag: Netherlands
Seen: 11-Aug-2025 14:58:20 CEST
Speed: 3.8 kts
Distance: 15.1 nm
Signal RSSI: -25.0 dBFS
Ship AIS VesselAlert © kx1t - link
VesselAlert
Name: THEODORUS
MMSI: 244989840
Callsign: PA3981
Type: Sailing
Flag: Netherlands
Seen: 23-May-2025 18:09:32 CEST
Speed: 4.1 kts
Distance: 14.6 nm
Signal RSSI: -14.3 dBFS
Ship AIS VesselAlert © kx1t - link
VesselAlert
Name: THEODORUS
MMSI: 244989840
Callsign: PA3981
Type: Sailing
Flag: Netherlands
Seen: 19-May-2025 15:08:26 CEST
Speed: 0.7 kts
Distance: 19.4 nm
Signal RSSI: -14.5 dBFS
Ship AIS VesselAlert © kx1t - link
VesselAlert
Name: THEODORUS
MMSI: 244989840
Callsign: PA3981
Type: Sailing
Flag: Netherlands
Seen: 18-May-2025 16:37:13 CEST
Speed: 0.5 kts
Distance: 17.7 nm
Signal RSSI: -17.0 dBFS
Ship AIS VesselAlert © kx1t - link
VesselAlert
Name: THEODORUS
MMSI: 244989840
Callsign: PA3981
Type: Sailing
Flag: Netherlands
Seen: 17-May-2025 16:14:53 CEST
Speed: 5.6 kts
Distance: 16.1 nm
Signal RSSI: -17.8 dBFS
Ship AIS VesselAlert © kx1t - link
VesselAlert
Name: THEODORUS
MMSI: 244989840
Callsign: PA3981
Type: Sailing
Flag: Netherlands
Seen: 15-May-2025 10:54:24 CEST
Speed: 5.7 kts
Distance: 16.4 nm
Signal RSSI: -17.6 dBFS
Ship AIS VesselAlert © kx1t - link
VesselAlert
Name: THEODORUS
MMSI: 244989840
Callsign: PA3981
Type: Sailing
Flag: Netherlands
Seen: 15-May-2025 10:54:34 CEST
Speed: 5.7 kts
Distance: 16.4 nm
Signal RSSI: -17.6 dBFS
Ship AIS VesselAlert © kx1t - link
