Field brief

Points, bars and humps

Land that runs out under the surface: a shoreline point, a submerged bar, an offshore hump rising off the basin.

Why: Structure that reaches from shallow to deep lets fish change depth without crossing open water. On a lake with no current, that vertical move is most of what a fish has to work with.

Find it: Extend every visible point out into the lake with your eye and fish that line, not the tip of the land.

Weed edges and vegetation lines

The outer edge where submerged weed stops, and the inside edge where it meets the bank.

Why: Weed holds invertebrates and fry, produces oxygen and provides ambush cover. The edge is where hunters patrol.

Find it: On calm water the edge shows as a colour change. Otherwise find it by feel — the depth at which weed stops is usually consistent across the whole lake.

Breaklines and drop-offs

The first sharp change from shallow shelf to deeper water, and any further step below it.

Why: A highway and a security blanket at once. Fish hold on it, travel along it and drop off it when they are disturbed.

Find it: Where the bank is steep the break is close in; where the bank is flat the break may be a long way out. The shoreline gradient usually continues underwater.

Inlets, outlets and any moving water

Feeder streams, outflows, aerators and channel necks between basins.

Why: Moving water in a still water is a magnet: cooler, better oxygenated and food-bearing. In summer and after rain it can hold most of the active fish in the lake.

Find it: Fish the fan of the incoming water and the colour line at its edge, and treat necks between two basins as pinch points.

Cover: timber, rock and hard structure

Standing or fallen timber, boulder fields, rock walls, docks, moorings and any built structure with published public access.

Why: Hard cover holds heat, grows food and provides ambush lanes. Fish relate to the shaded, current- or wind-protected side.

Find it: Work the edges and the shade line first. Only go into the tangle when the edges have not produced.

Flats and basins

The broad shallow shelf and the deep featureless basin — the two places most anglers walk past.

Why: Flats feed fish at low light and warm quickly in spring; basins hold suspended fish and bait through the hottest and coldest parts of the year.

Find it: Fish flats at the edges of the day. Treat a basin as water you search rather than water you pick apart.