Week 02 / 09 · Lantern Harbor

Harbor Pilot

Guide a robot boat through two harbor beacons, then align its bow with the north-facing dock.

Your robot · Twin-hull robot boat

New York
Tutoring Center

Lantern HarborGrid: C1–C5 · R1–R5
North = decreasing rowDrag to orbit · Scroll to zoom

Your challengeVisit the two beacons in order. Dock at C3 R1 facing north.

Build your program

Select an insertion slot, then choose a block. Use Up, Down, or Remove to edit.

When Run is clicked

Read the challenge. Make a prediction before you test.

Run trace / test history

How to play & hint

Start facing north. Reach beacon 1, turn right, reach beacon 2, then turn left toward the dock.

Camera rotation does not change the robot’s heading. Turns stay on the same tile. Reset returns the robot to its start; your program stays editable.

These are custom Scratch-inspired simulation blocks. This site does not run Scratch projects or control physical hardware.

Explain your thinking

Why can a boat reach the dock but still fail the docking check?

Predict → build → test → explain → revise. Swap driver and navigator roles after a test.

Game completion is saved on this device. Your teacher also reviews your explanation.