Em Doutor Quem: A Estratégia Sontaran , os Sontarans usam um "sinal de cordolano" para fazer com que as balas atinjam as armas de seus inimigos.
The figure reveals that the room is contained within a cordolane signal that excites the copper surface of the bullet and causes expansion in the barrel, rendering their guns useless, as well as blocking their radio signals (during which time Gray tries using his pistol but finds that is also useless).