Salvo
Sonar ready — 0 charges. Arm it, then pick a cell to scan its row and column.
Choose Play to open the harbor chart.
Keyboard grid, sonar & scoring
Tab through the grid and press Enter/Space on a cell, or tap a chart cell. S arms sonar · P to pause · H for help. Each native grid button announces its row, column and result.
Every accepted shot, hit or miss, spends one shell. Hits build a combo; misses reset it. Repeating a resolved cell does not spend ammunition. Sink the whole fleet before the shells run out.
Arm sonar, then choose a cell to scan its row and column. A scan spends one charge, not a shell; the gutter counts show every hull cell in those lines. Once that many hull cells are found, the rest is open water.
Four charts grow from 5 × 5 to 8 × 8. Sinking ships and clearing charts pay bonuses, including unused shells and sonar charges. A run with no misses earns 100 extra points.
Run layout & replay
Each new run draws a fresh layout with the same stage sizes and rules. Pause keeps your current layout.
Layout code
Open this same layout from the start
Bookmark the replay link to return to this layout. The end-of-run button draws a new one; use this link to retry the same challenge.