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Enavstar é a marca do Professor de Navegação Cláudio Barbosa. O Brasil precisa se entender com o Mar; queremos participar desse processo.

Atuamos no Ensino Marítimo prestando serviços em diversos clubes náuticos, empresas e particulares.

Photos from Divisão de Satélites e Sensores Meteorológicos's post 14/11/2025
27/06/2025

The Thunder Bay National Marine Sanctuary poster is here, and it’s stunning. Dive into history, beauty, and adventure with this breathtaking new artwork!

https://sanctuaries.noaa.gov/posters/thunder-bay/

About the poster-
The sunrise casts a gentle, orange glow on a mooring buoy marking one of the many shipwrecks that rest on the bottom of Thunder Bay National Marine Sanctuary. Scuba divers explore the pristine remains of a wooden schooner with masts still standing tall. History is well-preserved by the fresh, cold waters of this sanctuary, where lighthouses dot the shoreline, recreation opportunities are vast, and stories come to life.

🎨: Tonya Humiston/NOAA

29/03/2025

'It felt strange to carry the weight of knowing that we’d be solely dependent on each other, in the South Atlantic ocean where there would be very few, if any, other vessels around, and in winter conditions that could be relentless for the next four weeks.'

When Sophie O’Neill and Chris Kobusch ended up taking on a South Atlantic crossing in mid-winter, they knew it would be a lonely, stormy journey.

'At 75ft and 60 tons Pelagic Australis is a large and heavy boat, if all went well then we could have a good, safe crossing, but if things went wrong, with just two people alone on such a big boat, that is operated entirely manually, we knew it could be brutal out there.'

'It was during this first week that our main communications system went down. We were unable to download grib files and from then on relied on text messages from the handheld satellite phone to give us an outline of any weather systems coming our way.

'Before we had always spent a great deal of time reading weather files so it was strange to not have detailed information. However, it made us much more aware of the clouds and conditions around us instead, monitoring them more closely than ever before.'

'The sea seemed to loom from astern, waves began tumbling over one another, white horses colliding. Without hesitation we scrambled on deck to reef. Two big waves knocked Pelagic Australis onto her side, one pummelled into the cockpit and rushed inside the pilothouse.

'Chris and I worked silently on deck, no words uttered between us over the screaming winds. We both deeply resent shouting on boats and this manoeuvre felt almost balletic as we were lifted up by each great wave while the sails formed into their new shapes, like a dancer on stage.'

'But it was as we made our final approach to South Africa that we experienced the strongest blows, with 60-knot winds – thankfully without confused seas – and enjoyed our fastest surfs, hitting 17 knots some 400 miles off Cape Town!'

Read more at the link in the comments below.

12/10/2024

Olá, pessoal, bom dia!

🌀 Neste sábado, 12 de outubro, vamos ao giro meteorológico pelo Brasil. Confira as atualizações da previsão do tempo do LAPIS - Laboratório de Análise e Processamento de Imagens de Satélites.

🌀 [DESTAQUE] A imagem de satélite mostra nebulosidade sobre o Sudeste e Centro-Oeste, devido a um cavado (área de baixa pressão). A instabilidade atmosférica deve persistir, mantendo o céu nublado a parcialmente encoberto, favorável para chuvas regulares e volumosas. Temperaturas ficam mais amenas.

🌀 Em áreas da região Sul, o tempo volta a ficar estável, com retorno do Sol, em meio a maior presença e variação de nuvens. Não há previsão de chuvas. As temperaturas estão aumentando.

🌀 Em áreas do Nordeste, o Sol deve aparecer entre variação de nuvens, mantendo a condição de tempo firme e sem previsão de chuva. Isso ocorre devido à atuação de uma massa de ar mais estável, provocando aumento gradual das temperaturas. A atuação de uma fase seca da Oscilação Madden-Julian (MJO) pode inibir condição para chuvas.

📌 Receba esta previsão todos os dias em seu celular. Entre em nosso grupo exclusivo do Telegram: https://t.me/+WAmruATyHk70Avhs

25/09/2024

enavstar.com

What happens when the screens go dark? Although this seems pretty unlikely in today’s world of über-connectivity, what if a lightning strike or corrupted software update suddenly disables all your navigation systems?

Golden Globe Race and Ocean Globe Race competitor Ian Herbert-Jones gives his 7 rules for navigating a yacht without electronics.

Read more at the link in the comments below.

11/09/2024

The polar vortex elongated and weakened over Antarctica in July and August of 2024, causing rare warming events.

The polar vortex forms because fast-moving winds in the stratosphere – the second-lowest layer of Earth’s atmosphere – loop around the South Pole in winter. Sometimes disturbances cause the winds to weaken and the flow to change shape, resulting in considerable stratospheric warming over Antarctica.

In July, stratospheric temperatures above Antarctica are usually around -80 °C (-112 °F). But on July 7, 2024, stratospheric temperatures jumped by 15 °C (27 °F), setting a record for the warmest July temperatures observed in the stratosphere in the Antarctic region. The temperature then cooled off on July 22 before rising 17°C (31°F) on August 5.

These maps show air temperatures in the middle of the stratosphere for August 5, 2023 (left) and the same date in 2024 (right), illustrating the elongation of the vortex and higher temperatures close to the pole in 2024. Data for the maps are from NASA’s GEOS forward processing (GEOS-FP) model, which assimilates meteorological data from satellite, aircraft, and ground-based observing systems. Learn more: https://go.nasa.gov/47gGIO2

11/09/2024

Com Raymarine USA -- Acabei de receber o status de superfã! 🎉

11/09/2024

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