Why John Christodoulou's Zeus stays slow in Greece

ZEUS, owned by John Christodoulou, is a 74.1-metre superyacht built by Blohm + Voss. She carries a powerful gas turbine that can push her to 36 knots. Our tracking data shows she rarely exceeds 15 knots. This speed limit explains why she stays close to shore.

The 74.1-metre superyacht ZEUS sits at anchor in the Ionian Sea. Her position is fixed at 38.39° N, 20.72° E. The AIS signal shows no movement since early August 2026. This stillness matches a pattern seen throughout the summer.

John Christodoulou bought the vessel in 2017. He is a British-Cypriot Property developer worth billions. His wealth comes from Real estate deals across Europe and the UK. He now lives in Monaco with his family.

The yacht was built in 1991 by the German yard Blohm + Voss. It was originally named ECO. Larry Ellison owned it later and renamed it Enigma. Mr. Christodoulou changed the name to ZEUS when he took possession.

How does the turbine affect her range?

The gas turbine produces 18,500 horsepower. It drives one water jet. The two diesels drive the other. Each engine powers its own jet. This layout gives high speed potential.

Crossing the Atlantic takes three days. The yacht needs one mid-ocean refuel. The original owner commissioned a tanker. The tanker followed the yacht closely. It refilled the tanks while at sea.

This support system is rare today. Fuel costs have risen sharply. Tanker operations are expensive. Most owners skip the turbine entirely. They stick to diesel engines only.

Mr. Christodoulou keeps the turbine intact. He does not seem to use it often. The AIS tracks show low speeds. He runs the diesels most of the time. This saves fuel and money.

What limits the speed of this yacht?

ZEUS has a unique engine setup. It uses two diesel engines and one gas turbine. The diesels provide steady power for normal cruising. The turbine provides extra power for high-speed runs.

The gas turbine produces 18,500 horsepower. This is enough to reach speeds of 36 knots. That is very fast for a boat of this size. It can cross oceans in days instead of weeks.

But the turbine burns fuel at a huge rate. It cannot run for long periods without refueling. The original owner had to use a dedicated tanker ship. This tanker followed the yacht to refill its tanks at sea.

This system is expensive and complex. It requires support vessels and careful planning. Most owners do not want this hassle for daily travel. They prefer the efficiency of diesel engines.

Mr. Christodoulou avoids the turbine. He prefers lower speeds that save fuel. This choice keeps him closer to home ports. He does not need to chase tankers across the Atlantic.

What did the August track reveal?

The chart shows the passage from Paros to Athens. It covers 105 nautical miles. The date was 2 August 2026. The average speed was 13.8 knots. This is well below her max rating.

The map shows her position in the Ionian Sea. She held station at 38.39° N, 20.72° E. The track shows four short passages. These happened between 2 and 5 August. They stayed near the Greek coast.

Other August voyages tell a similar story. One leg went from Capri to Palau. It covered 213 nautical miles. The average speed was 15.2 knots. Another leg ran from Agropoli to Sorrento. It covered nearly 59 nautical miles. The average speed was 14.1 knots.

A longer trip linked La Maddalena to Portofino. It covered 187 nautical miles. The average speed reached 16.7 knots. This is faster than the Greek legs. It shows the yacht can go quicker when needed.

The fastest recorded leg was from Monaco to Saint-Tropez. It covered 45 nautical miles. The average speed was 14.7 knots. The maximum speed hit 17.9 knots briefly. These numbers confirm the design limits.

Where did ZEUS travel in August 2026?

Our AIS records show four short trips in August. These movements were all within Greece. The yacht stayed near the coast. It did not venture into open water.

The first trip started on 2 August. It went from Paros to Athens. The distance was 105 nautical miles. The average speed was 13.8 knots. This is well below the maximum rating.

Another leg covered 18 nautical miles. It moved between coastal points. The speed averaged 14 knots. These numbers are consistent with diesel-only operation.

A third segment saw the yacht move 50 nautical miles. The average speed rose slightly to 14.3 knots. This suggests efficient cruising under good conditions.

The final recorded movement was 27 nautical miles. It ended near the same area. The average speed was 14.8 knots. All these legs used less than 15 knots.

Who owns ZEUS today?

John Christodoulou bought the yacht in 2017. He is a British-Cypriot Property developer. He founded the Yianis Group. His wealth comes from Real estate. He now lives in Monaco.

The previous owner was Larry Ellison. He sold the yacht after buying Rising Sun. That yacht is over six times bigger. Ellison took delivery of it in 2012.

Before Ellison, the yacht belonged to Aidan Barclay. His father owned the Telegraph newspaper. Aidan sold it when he wanted a new boat. The chain of owners shows how yachts change hands.

The current value is estimated at fifty million dollars. The sale price in 2017 was not public. The yacht features teak wood decking. Maritime registries list her as a motor yacht.

Christodoulou supports charities focused on education. He directs efforts through his foundation. The yacht fits his lifestyle as a private traveler. He values privacy and comfort.

How does this compare to other voyages?

Earlier trips in August showed different patterns. One voyage went from Capri to Palau. It covered 213 nautical miles in about thirteen hours. The average speed was 15.2 knots.

Another leg ran from Agropoli to Sorrento. It covered nearly 59 nautical miles. The average speed was 14.1 knots. These speeds are still modest for a yacht with a turbine.

A longer trip from La Maddalena to Portofino covered 187 nautical miles. The average speed reached 16.7 knots. This is faster than the Greek legs. It shows the yacht can go quicker when needed.

The fastest recorded leg was from Monaco to Saint-Tropez. It covered 45 nautical miles. The average speed was 14.7 knots. The maximum speed hit 17.9 knots briefly.

These numbers confirm the design limits. The yacht is capable of higher speeds. But the operator chooses to stay slow. This saves money and reduces complexity.

John Christodoulou bought the yacht in 2017. He paid a reported price that was not made public. The current value is estimated at fifty million dollars.

He is a billionaire Property developer. His company, Yianis Group, builds homes and offices. He started in Cyprus and moved to the UK. He now lives in Monaco.