A reputation written in rock
Mariners who passed Cornwall have long treated it with caution. The peninsula juts far out into the Atlantic, directly across some of the busiest sea lanes in northwestern Europe, and its western tip is the first major landfall for ships arriving from the open ocean. The combination of hard rock, strong tides and changeable weather gave parts of the coast a reputation as a hazardous coastline. This article explains the natural reasons. The individual stories of particular wrecks are covered elsewhere, in the article on shipwreck stories, so the focus here is on the geography and the sea.
Position and traffic
For centuries, ships bound to and from Atlantic destinations, the English Channel and ports further up the coast passed near the Cornish headlands. Sailing vessels depended on the wind and could not always choose their course. Navigation near the coast was a necessity, since vessels needed to make landfall to fix their positions before running into the Channel. That brought a large amount of traffic into an area with many hazards. The wider picture of seafaring is described in the account of maritime history.
The rocks themselves
Much of the coast is made of hard rock that drops sharply into deep water or continues as submerged ledges. Several features made it dangerous:
- Headlands and reefs. Rocky points extend into the sea, and reefs and isolated rocks lie offshore, some only exposed at low tide. These are the remains of land that has been worn away, a process described in the article on caves and stacks.
- Cliffs with few landing places. A ship that struck the cliffs offered survivors little chance of reaching safety. Few beaches exist in some stretches, and many coves are small or cut off at high tide.
- Rocks hidden by the tide. A rock that stands clear at low water can be submerged at high water, and the same stretch of sea looks very different at different stages of the tide.
Weather and the lee shore
The prevailing winds in the region blow from the southwest, and the Atlantic can send gales and heavy seas across the approaches. A sailing ship caught in strong onshore wind could not easily sail away from the land. A coast with the wind blowing toward it is called a lee shore, and it is among the oldest fears in seamanship. A ship might be driven toward the rocks despite the crew’s efforts, or be unable to beat out of a bay.
Fog and low cloud made matters worse by hiding landmarks. Storms could also destroy rigging, damage rudders or force vessels off course. Before reliable position-fixing, a ship’s captain might have only a rough idea of where it was.
Tides and currents
Tidal streams run strongly around some headlands and across the mouths of bays. They can carry a vessel sideways toward danger, particularly in light winds or fog. Races, areas of rough, fast-moving water near points of land, can be troublesome even for experienced mariners. The behavior of the tides is explained in the article on coastal tides, and similar forces are what create hazards for bathers today.
Limited shelter
A sailor in distress needs somewhere to run to. In places the coast offers few safe harbors, and many of the best anchorages are on the south side, behind headlands. A ship in a storm on the exposed north coast might have little choice but to ride it out in open water. Harbors that did exist often needed careful approach, and harbor entrances could be dangerous in a heavy sea. The question of how ports were built is covered under harbor design.
Responses to the danger
Over time, seafarers and coastal communities developed ways to reduce the risk:
- Lighthouses and beacons marked headlands and offshore rocks. The story is told in the article on Cornish lighthouses.
- Charts and sailing directions improved, helping navigators recognize hazards.
- Lifesaving services grew up, with volunteer crews launching boats to rescue those in peril. Their work is described in the account of the lifeboat service.
- Coastguard and weather forecasting developed in later periods, giving earlier warning of storms.
- Modern navigation such as radar and satellite positioning has made groundings far less common, though they have not vanished.
Wreckers and smugglers appear in popular memory too, and some of that is legend. How much of the stories is true is debated, and the topic of Cornish smuggling is treated separately. This article does not make claims about it.
Hazards that remain
The coast is still dangerous, to boaters and to people on land.
- Strong tides and currents continue to affect small boats, kayaks and swimmers.
- Fog and sudden weather change can still catch walkers and sailors by surprise.
- Rocky shores are slippery and may be cut off by the tide.
- Wreck sites and old structures can be hazardous and sometimes protected, so leave them alone.
- Anything washed ashore, such as old equipment or unfamiliar objects, should not be touched or moved. Report anything suspicious to the coastguard.
If you or someone else is in danger on the coast, call the national emergency number and ask for the coastguard. Staying alert to the conditions and keeping to the advice in the guide to coastal safety makes sense in any season.
The sea has not changed
The headlands and reefs that troubled mariners are largely still where they were. What has changed is knowledge and technology. Looking at the coast with a sailor’s eye helps explain why lights stand where they do and why communities along it built a tradition of rescue.