Free boat-handling workbench

Rig springs before the helm moves

Watch each named line take the load, then try a berth and spring off. Bow and stern lines hold the ends in. Springs run diagonally and stop surge.

Boat docking simulator

Alongside layout

Docking lines

Watch each line take the load, then try a berth and spring off.

Link to this tool
Open waterPontoonBOWSTERNBowSternBow springStern springAheadAmidshipsAstern

Look at the picture. Two short end lines, two longer dashed springs. Then press Next.

BowSternBow springStern springBreast

Step 1 of 10

See the four-line set

Alongside a pontoon, bow and stern lines hold the ends in. Springs run diagonally along the boat and stop it surging fore and aft.

  1. 1Bow and stern lines are short and hold the ends in.
  2. 2Springs run along the boat, not square to the pontoon.
  3. 3Dashed lines are the springs.

Look at the picture. Two short end lines, two longer dashed springs. Then press Next.

Direct answer

A settled alongside set uses a bow line, a stern line, a bow spring led aft, and a stern spring led forward. The springs check surge; the end lines hold the boat in. A breast line is a short square line amidships, often useful as the first line ashore.

Best for
Day Skipper practical preparation
Includes
Bow, stern, springs, breast, springing off
Format
Free layout simulator
Sources and factual review

Reviewed 13 August 2026. Line names and springing-off sequences follow the published RYA Day Skipper and Competent Crew boat-handling scope. Local marina practice and tidal range still govern the real berth.