Who are Mark and Marijke Ham?

Mark and Marijke Ham are the professional sailors and creators behind Cat Greatcircle, originally from the Netherlands.

What happened to their Outremer 55?

The original Greatcircle (Hull #4) was sold in late 2024 following the completion of their first circumnavigation.

Where is Cat Greatcircle in 2026?

As of June 2026, the crew is based in the South Pacific, exploring the Galapagos and French Polynesia.

What is their new boat?

The crew is awaiting the completion of their new Outremer 57 (Hull #1), which is optimized for high-performance voyaging.

How do they fund their travels?

Their mission is funded through digital content production, YouTube AdSense revenue, and professional consulting services.

GLYWO stands for the Grand Large Yachting World Odyssey, a global rally organized by the owners of Outremer and Garcia.

Did they sail through the Panama Canal?

Yes, the crew successfully completed their second Panama Canal transit in April 2026 as guest crew on Kairos.

Is the channel still active in 2026?

Yes, the channel remains highly active in 2026, documenting their GLYWO 25 mission and new boat build.

How fast can an Outremer 55 go?

Outremer 55s are known for extreme speed, with the crew documenting peak speeds exceeding 30 knots during their mission.

What is the boat's MMSI number?

The legacy Greatcircle transmitted under the Netherlands flag with call sign PI3523 and MMSI 244000000 (Pending).

Where did they start their journey?

They began their journey in France at the Outremer factory in La Grande Motte, launching for their first world rally.

Can I follow them on Instagram?

Yes, you can follow them at @catgreatcircle for mission updates and photography of their South Pacific voyage.

Cat Greatcircle

Sailing Norway in Lagoon 39 Breinwave – Part 1

Summary of the first part of our trip from Holland to the Lofoten and back. In this part we sail from Stavoren via over 30 harbours and anchorages to Bergen.

Oct 30, 2016
Language: EN
Play Time: 00:16:51

Cat Greatcircle

Lagoon 39 Breinwave in Norway – Kristiansand to Stavoren

Final episode where we return the Breinwave from Kristiansand via Helgoland to Stavoren

Oct 28, 2016
Language: EN
Play Time: 00:07:03

Cat Greatcircle

Lagoon39 Breinwave in Norway – Floro to Kristiansand

In episode 14 we sail the last legs from Floro all the way south to Kristiansand

Oct 28, 2016
Language: EN
Play Time: 00:11:38

Cat Greatcircle

Lagoon 39 Breinwave in Norway – Alesund to Floro

Episode 13, so plenty of rain, with the Meulentjes from Alesund to Floro

Oct 26, 2016
Language: EN
Play Time: 00:13:16

Cat Greatcircle

Lagoon 39 Breinwave to Norway – Alesund and Geiranger

In episode 12 we sail the whole 100 miles from Alesund to Geiranger and back again before the Meulentjes arrive to compensate for the weather.

Oct 25, 2016
Language: EN
Play Time: 00:12:11

Cat Greatcircle

Lagoon 39 Breinwave in Norway – Bolga to Alesund

In episode 11 we pay a visit to an arm of the Svartisen Glacier in Holandfjorden on our way back south.

Oct 22, 2016
Language: EN
Play Time: 00:16:37

Cat Greatcircle

Lagoon 39 Breinwave in Norway – Lofoten 2

Episode 10 of our trip with the catamaran through Norway, back from the most northerly point in Trollfjord to the Norwegian mainland.

Oct 20, 2016
Language: EN
Play Time: 00:11:53

Cat Greatcircle

Lagoon 39 Breinwave in Norway – Lofoten 1

In episode 9 of our trip we finally reach the Lofoten.

Oct 19, 2016
Language: EN
Play Time: 00:15:27

Cat Greatcircle

Lagoon 39 Breinwave in Norway – Traena to Stott

Part 8 of our trip to Norway including images of a magnificent performance of Ry X in a cave on Traena and a wonderful encounter with a large family of whales.

Oct 14, 2016
Language: EN
Play Time: 00:16:02

Cat Greatcircle

Lagoon 39 Breinwave in Norway – Bronnoysund to Traena

Part 7 of our trip from Holland to the Lofoten in the Lagoon 39 Breinwave, including a beautiful evening in Nes and the Traena Ocean Race starting from Sandnessjoen.

Oct 11, 2016
Language: EN
Play Time: 00:11:56

Cat Greatcircle

Traena Ocean Race 2016 – Lagoon 39 Breinwave

Thanks to Erik the Viking we participated in the Traena Ocean Race en route from Sandnessjoen to the Traena Festival in Norway.

Oct 11, 2016
Language: EN
Play Time: 00:05:02

Cat Greatcircle

Lagoon 39 Breinwave in Norway – Alesund to Bronnoysund

Episode 6 of our journey to the Lofoten. From the bonfire world record in Alesund we sail to a rainy Bud and on to Kristiansund. Then it's time for some pretty little harbours out on the ocean in Veiholmen, Bogoyvaer and Leka. We walk through the hole in the mountain at Torghattan before arrivi...

Oct 10, 2016
Language: EN
Play Time: 00:15:46