Desmos Battleship is an engaging activity in which students can improve their visualisation skills, and deepen their understanding of linear functions and circles by making connections between algebraic and graphical representations. The Desmos Battleship activity was used in a Saturday STEM (Science, Technology, Engineering, and Mathematics) program, conducted with students in Years 7 and 8. Students were actively engaged, and challenged whilst interacting in this activity. Feedback and informal observations clearly indicated that the students enjoyed using the technology in a creative hands-on way to learn mathematical concepts, and to apply their knowledge and understanding of these.