The Mariner

‘The Mariner’ covers everything the new or developing sailor might need: boat maintenance, sail trim, coastal & offshore navigation, engine repairs, rope work & safety. Chris has sailed over 345,000Nm on all kinds of boats from 25’ - 150’ but his passion is sail training. Uploading twice a week this channel runs along side the popular ‘The Mariner’ podcast also hosted by Chris.

Boston, United States· Oct 2026

200 videos· 117 deeply analysed

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Considerations Before a Serious Collision & Transiting the Cape Cod Canal With a 125ft Mast20 Oct 2026

Published20 Oct 2026

Duration42:01

Views3K

Are We Ready for the Atlantic? | Big Winches & Little JobsProper winch operation requires at least three turns on the drum and keeping hands clear of moving parts.18 Oct 2026

Published18 Oct 2026

Duration35:51

Views7K

Crew Training | The Dragon Bowline | Pizza 17 Oct 2026

Published17 Oct 2026

Duration18:26

Views6K

Osprey's Transatlantic Crew ArrivesCrew members perform maintenance on an 80-foot boat in Mattapoisett, including resealing hatches and rebuilding winch gearboxes.16 Oct 2026

Published16 Oct 2026

Duration11:24

Views5K

Preparing OSPREY for the Atlantic - Come Take a Look!Chris Stanmore-Major prepares *Osprey* in Mattapoisett for a transatlantic crossing, focusing on deck painting and sail maintenance.10 Oct 2026

Published10 Oct 2026

Duration16:07

Views9K

Cruising Under Sail | Eric Hiscock | Hull Form StabilityHull form, beam-to-length ratio, and bilge shape determine a yacht's initial stability rather than ballast weight alone.8 Oct 2026

Published8 Oct 2026

Duration52:43

Views4K

Cruising Under Sail by Eric Hiscock Part 1Chris Stanmore-Major reads Eric Hiscock's *Cruising Under Sail* aloud while repositioning Osprey to the Canary Islands.7 Oct 2026 · Boston, United States

Published7 Oct 2026

Duration1:01:42

Views5K

LocationBoston, United States

Anchoring Solo With No Engine & Updates on the Crewed Atlantic Voyage Oct 2026 PreparationChris prepares his boat for the Global Solo Challenge by repairing a damaged mainsail and installing an engine.30 Sept 2026 · Mattapoisett, United States

Published30 Sept 2026

Duration39:00

Views18K

LocationMattapoisett, United States

Sailing to Newport, my Trimaran Project & Notes on Archive Management for L- Matrix AI'sOsprey's 125-ft mast nearly matched Newport's new wind farm's 127-ft air clearance during the Newport Bermuda Race approach.6 Jul 2026 · Boston, United States

Published6 Jul 2026

Duration42:06

Views10K

LocationBoston, United States

Taking a Look Around the Waterfront in Lunenburg, Nova ScotiaChris departs Lunenburg without a propeller, sailing 400 miles to Newport after a DHL delivery stalls for 10 days.7 Jun 2026 · Lunenburg, Nova Scotia

Published7 Jun 2026

Duration24:44

Views20K

LocationLunenburg, Nova Scotia

Solo Docking an 80ft Yacht Without Use Of The Auxillary EngineChris docks a 25-ton, 80-foot yacht solo in Lunenberg Harbour at night with no engine.26 May 2026 · Lunenburg Harbour, Nova Scotia

Published26 May 2026

Duration39:37

Views31K

LocationLunenburg Harbour, Nova Scotia

Introducing Longitudinal AI SystemsA year-long ChatGPT method built around one continuous thread manages an 80-foot offshore solo project.20 May 2026

Published20 May 2026

Duration27:18

Views10K

The Flat Earth Debate Debunked in 10 Minutes by a Real Offshore NavigatorA navigator entering Lunenburg in fog after 4,000 miles explains why celestial navigation proves a spherical Earth.10 May 2026 · Lunenburg, Nova Scotia

Published10 May 2026

Duration9:27

Views17K

LocationLunenburg, Nova Scotia

Ghosting Through The FogChris completes a 30-day solo transatlantic and qualifies for the 2027 Global Solo Challenge, entering Lunenburg fog-bound with no engine.6 May 2026 · Lunenburg Harbour, Nova Scotia

Published6 May 2026

Duration24:14

Views21K

LocationLunenburg Harbour, Nova Scotia

Then I Realised the Propellor Was MissingA MaxProp fails silently overnight 28 miles from Lunenburg, forcing a solo sail-only harbor entry.4 May 2026 · off the coast of Nova Scotia

Published4 May 2026

Duration27:22

Views40K

Locationoff the coast of Nova Scotia

Repairing a Hydraulically Locked Engine at Sea — But Does She Run?Clearing a hydraulically locked marine diesel engine by draining the water lock and purging cylinders via cranking.28 Apr 2026

Published28 Apr 2026

Duration39:06

Views45K

Engine Suddenly Stopped Working Offshore — Is It Hydraulic Lock?Removing fuel injectors allows trapped water to escape a hydraulically locked diesel engine during offshore repairs.27 Apr 2026

Published27 Apr 2026

Duration37:32

Views18K

Well... That's Not A Good Noise !A marine diesel engine failing to turn over with a clacking sound may indicate a hydraulic lock.26 Apr 2026

Published26 Apr 2026

Duration22:26

Views30K

Preparing For The Storm : How to Lie A-hullA sailor prepares to lie a-hull after mainsail batten failures and an incoming 40-knot weather system.25 Apr 2026 · off the coast of Nova Scotia

Published25 Apr 2026

Duration35:51

Views61K

Locationoff the coast of Nova Scotia

Let the Storm Rage – Lying A-hull in a Yacht in Heavy WeatherA solo sailor manages 60-knot gusts by lying a-hull in a Kevlar-hulled yacht designed for stability.24 Apr 2026

Published24 Apr 2026

Duration20:01

Views170K

Protect Yourself - Learn How to Stop Safely at Sea in Heavy Weather Lying ahull in 50 knots, an 80-foot race boat sheds wave energy without sails or drogues.24 Apr 2026 · 500 miles offshore

Published24 Apr 2026

Duration18:42

Views25K

Location500 miles offshore

Riding Out a 50 Knot Storm, 500 Miles From LandBatten damage forces Chris to lie ahull 500 miles off Nova Scotia in a 50-knot storm.23 Apr 2026 · 500 miles off the coast of Nova Scotia

Published23 Apr 2026

Duration9:43

Views533K

Location500 miles off the coast of Nova Scotia

I Sailed 5,000 miles Alone Offshore With AI Solo sailor runs 250,000-word single ChatGPT conversations to replace crew-based distributed cognition offshore.22 Apr 2026

Published22 Apr 2026

Duration14:04

Views17K

Don't Be a Victim : How to Prepare for a StormChris's "rule of 15" warns GRIBS can be 15 knots, 15 hours, and 150 degrees wrong.21 Apr 2026 · Grand Banks of Newfoundland

Published21 Apr 2026

Duration32:53

Views50K

LocationGrand Banks of Newfoundland

Afraid of Gybing? Don't Be.Reefing the mainsail and keeping the jib sheeted helps prevent rounding up during a solo gybe.19 Apr 2026

Published19 Apr 2026

Duration18:20

Views34K

Running Out of Water in the Middle of the OceanA blocked Spectra watermaker membrane left Chris surviving on 250 ml per day for two weeks on an Open 60.17 Apr 2026 · middle of the Atlantic Ocean

Published17 Apr 2026

Duration24:49

Views12K

Locationmiddle of the Atlantic Ocean

Reduce Stress At Sea: Always Use a PreventerA batten pops out 85 feet up the rig; Chris recovers it from the deck using a preventer.16 Apr 2026

Published16 Apr 2026

Duration28:03

Views32K

Lessons 'Titanic' is Still Teaching After 124 Years.A Raymarine GPS failure at 40 knots at night shows why heaving-to is a critical solo-sailing skill.14 Apr 2026 · middle of the Atlantic

Published14 Apr 2026

Duration49:44

Views7K

Locationmiddle of the Atlantic

Lithium Batteries On Boats Are Not Dangerous - Ignorance Is.A BMS shutdown at 22.75 V on two Li-Time 24-volt batteries reveals what not to do when LiFePO4 goes flat.13 Apr 2026 · North Atlantic Ocean

Published13 Apr 2026

Duration27:34

Views17K

LocationNorth Atlantic Ocean

Sailing Questions Answered : Mid-Atlantic Chris explains fore-reaching versus heaving to on a Volvo 60 mid-Atlantic passage in 20 knots.11 Apr 2026 · Atlantic Ocean

Published11 Apr 2026

Duration24:44

Views3K

LocationAtlantic Ocean

Defeat Fear at Sea : Learn to Heave ToA solo skipper heaves to for 50 miles of overnight drift to dodge a weather system near Madeira.8 Apr 2026

Published8 Apr 2026

Duration18:21

Views193K

Raw Footage from Solo Transatlantic Voyage 300Nm West of the Strait of GibraltarSolo Force 8 night passage west of Gibraltar with a broken GoPro, failed propeller, and no wind instruments.7 Apr 2026 · 300Nm West of Gibraltar Straits

Published7 Apr 2026

Duration10:59

Views8K

Location300Nm West of Gibraltar Straits

Working with Predict Wind & GRIB files Offshore PredictWind's PWE and PWG correction layers explained offshore near Portugal, with no boat polars available.6 Apr 2026 · off the coast of Portugal

Published6 Apr 2026

Duration32:04

Views5K

Locationoff the coast of Portugal

A Totally Unhinged Evening SailA gooseneck pin fell out on an Open 60, freeing a 200 kg boom and destroying two Raymarine screens.4 Apr 2026 · off Cap Finisterre, Spain

Published4 Apr 2026

Duration24:53

Views9K

Locationoff Cap Finisterre, Spain

Sailing Into The Atlantic, Solo.Solo Atlantic departure from Cherbourg with a jammed throttle, leaking gearbox cooler, and no wind instruments.2 Apr 2026 · Atlantic Ocean

Published2 Apr 2026

Duration16:43

Views7K

LocationAtlantic Ocean

My 2800Nm Solo Transatlantic Voyage Begins!Chris departs Cherbourg solo on his 37th transatlantic, bound for Newport on Osprey.31 Mar 2026 · Cherbourg, France

Published31 Mar 2026

Duration11:40

Views4K

LocationCherbourg, France

Final Jobs before Solo Transatlantic Voyage A custom acetal jig helps measure and fit a replacement section of a unique, discontinued mast track.29 Mar 2026 · Shoreham-by-Sea, England

Published29 Mar 2026

Duration9:11

Views2K

LocationShoreham-by-Sea, England

Exiting the Inner Harbour Chris coordinates a port-side lock exit in Cherbourg to protect a recent starboard hull repair.27 Mar 2026 · Cherbourg, France

Published27 Mar 2026

Duration18:51

Views2K

LocationCherbourg, France

T Zero- Time to Get GoingChris prepares his boat for departure, detailing fuel system upgrades and plans for final rig tuning.26 Mar 2026

Published26 Mar 2026

Duration12:24

Views2K

T-1 to Solo Sailing Transatlantic Voyage Resealing stanchion bases prevents water ingress and structural corrosion in Kevlar-hulled boats during offshore passages.25 Mar 2026 · France

Published25 Mar 2026

Duration21:34

Views2K

LocationFrance

T-2 Days - Getting into Departure Mode An Open 60 undergoes final mechanical, electrical, and logistical preparations before an Atlantic crossing and race participation.24 Mar 2026 · Sherbrooke, Nova Scotia

Published24 Mar 2026

Duration17:36

Views1K

LocationSherbrooke, Nova Scotia

Newport Bermuda Entry 2026 Confirmed.Osprey enters the Newport Bermuda Race, Gibbs Hill division, starting June 16 at $6,800 entry.23 Mar 2026

Published23 Mar 2026

Duration19:48

Views1K

T-3 Days (Hopefully) to Solo Transatlantic Voyage A Swan 80 undergoes final systems repairs and logistics planning ahead of a solo transatlantic voyage.22 Mar 2026

Published22 Mar 2026

Duration20:01

Views1K

T- 4 days (ish) Before Solo Transatlantic Chris upgrades his sailboat’s fuel manifold and mast track in final preparations for a solo transatlantic crossing.20 Mar 2026

Published20 Mar 2026

Duration22:53

Views2K

90 days to the Newport Bernuda Race Osprey needs three crew sponsors to cover the $6,000 Newport Bermuda Race entry and life raft recertification before departure.18 Mar 2026

Published18 Mar 2026

Duration13:11

Views1K

Quick Update - 5 days Before Solo Transat Departure on Osprey.Chris prepares the Grand Mistral for a solo transatlantic crossing while finalizing repairs and race registration.17 Mar 2026 · Sherbrooke, Nova Scotia

Published17 Mar 2026

Duration9:12

Views1K

LocationSherbrooke, Nova Scotia

Osprey in Cherbourg, Preparing for Solo Transat!Refitting a Volvo 80 requires hydraulic rig tuning, custom mast track fabrication, and resolving engine oil leaks.7 Mar 2026 · Cherbourg, France

Published7 Mar 2026

Duration11:17

Views1K

LocationCherbourg, France

On the Dock in Cherbourg A Volvo 60 refit project in Cherbourg focuses on bilge system upgrades and fore triangle rig modifications.9 Feb 2026 · Cherbourg, France

Published9 Feb 2026

Duration17:25

Views2K

LocationCherbourg, France

Moving Osprey to Cherbourg Inner BasinSolo docking of an 80-foot boat through Cherbourg's lock at midnight, timed to high tide and calm air.8 Feb 2026 · Cherbourg Inner Basin, France

Published8 Feb 2026

Duration18:28

Views2K

LocationCherbourg Inner Basin, France

Ready Sailor One... A five-reef mainsail converts a Farr 85 to Open 60 sail geometry for solo round-the-world preparation.6 Feb 2026 · Cherbourg

Published6 Feb 2026

Duration17:47

Views3K

LocationCherbourg

Arriving in BostonA solo sailor performs a mast-up lift of a 5,500-pound yacht at Admiral’s Hill Marina in Boston.31 Jan 2026 · Admiral's Hill Marina, Boston, Massachusetts

Published31 Jan 2026

Duration20:10

Views6K

LocationAdmiral's Hill Marina, Boston, Massachusetts

Getting Underway - Portland to BostonSpirit of England sails Portland to Boston jib-only, no autopilot, with the mast coming back out on arrival.7 Dec 2025 · Portland

Published7 Dec 2025

Duration24:52

Views7K

LocationPortland

Marine Accident Investigation | 'Mollie'A faulty winch control switch killed skipper Lyle Babington 2.8 miles from the Needles Lighthouse.2 Dec 2025 · 2.8 nautical miles south-southwest of the Needles Lighthouse, Isle of Wight, England

Published2 Dec 2025

Duration22:20

Views17K

Location2.8 nautical miles south-southwest of the Needles Lighthouse, Isle of Wight, England

Afloat Again: First StepsSpirit transits Portland's Casco Bay Bridge with a 65-foot mast and only 68 feet of clearance.28 Nov 2025 · Portland, Maine

Published28 Nov 2025

Duration18:07

Views5K

LocationPortland, Maine

Marine Accident Investigation | Roaring Meg of CowesTwo accidental jibes on Roaring Meg of Cowes in Southampton Water injured two crew in 2006.26 Nov 2025 · Southampton Water, UK

Published26 Nov 2025

Duration37:29

Views27K

LocationSouthampton Water, UK

F40 Trimaran: Get There, Step Mast & LaunchA professional towboat assists in launching a wide-beam F40 trimaran to avoid difficult low-speed maneuvering challenges.21 Nov 2025 · Cherbourg, France

Published21 Nov 2025

Duration16:14

Views4K

LocationCherbourg, France

Fastnet 2025- Done! Next Project: Trimaran 'Spirit' Chris transitions from his 80-foot boat to a 40-foot trimaran project in Portland, Maine.23 Sept 2025 · 50 degrees north, UK

Published23 Sept 2025

Duration5:43

Views2K

Location50 degrees north, UK

Osprey Spreads Her WingsChris adapts an Open 60 spinnaker and a five-reef mainsail system to improve handling on an 80-foot boat.29 Jul 2025 · England, United Kingdom

Published29 Jul 2025

Duration6:11

Views2K

LocationEngland, United Kingdom

Downhill at Last & A Conservative First NightThe crew maintains a conservative double headsail configuration while navigating traffic separation schemes south of Fastnet Rock.28 Jul 2025 · off the coast of Ireland, south of Fastnet Rock

Published28 Jul 2025

Duration7:13

Views2K

Locationoff the coast of Ireland, south of Fastnet Rock

Fastnet on the BowThe 80-foot Osprey rounds Fastnet Rock after a beat from the Solent during the Fastnet race.28 Jul 2025 · Fastnet Rock, Ireland

Published28 Jul 2025

Duration7:36

Views3K

LocationFastnet Rock, Ireland

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100 miles north of Antigua12.8 nautical miles south-southwest of the Needles Lighthouse, Isle of Wight, England1300Nm West of Gibraltar Straits150 degrees north, UK1500 miles off the coast of Nova Scotia1500 miles offshore1Aberdeen City, United Kingdom1Admiral's Hill Marina, Boston, Massachusetts1approaching Bermuda1approaching the English Channel1Ardoise, Canada1Atlantic Ocean3Boston, United States2Boutiliers Point, Canada1Castletown, United Kingdom1Celtic Sea, 100 nautical miles from Fastnet Rock1Cherbourg1Cherbourg Inner Basin, France1Cherbourg, France5Cornwall, United Kingdom1Dartmouth, Canada4England, United Kingdom1English Channel1English Channel, south of the Lizard, UK1Fastnet Rock, Ireland1France1Grand Banks of Newfoundland1Koltur, Faroe Islands1Laurentian Channel, off the coast of Nova Scotia1Lunenburg Harbour, Nova Scotia2Lunenburg, Canada1Lunenburg, Nova Scotia2Mattapoisett, United States1middle of the Atlantic1middle of the Atlantic Ocean1North Atlantic Ocean7North Shore Village, Bermuda1off Cap Finisterre, Spain1off the coast of Ireland, south of Fastnet Rock1off the coast of Nova Scotia4off the coast of Portugal1Portland1Portland, Australia1Portland, Maine1Seaview, United Kingdom1Sherbrooke, Nova Scotia2Shoreham-by-Sea, England1Southampton Water, UK1Timberlea, Canada1