Electrical accumulator with water sensor

A boat comprising:

• an electrical storage having a storage element electrically connected to a positive and a negative pole;
• a water sensor configured to determine whether one of the poles is in contact with water;
• a disconnection device operatively connected to the water sensor and configured to interrupt the electrical connection between at least one of the poles and the storage element,
• wherein either:
• (a) the water sensor comprises:
• a first and a second measuring contact, the first and second measuring contacts separated from each other by a gap between the first and second measuring contacts;
• and
• a measuring circuit between the first and the second measuring contact, the measuring circuit configured to determine an electrical measurement value present in the gap between the first and second measuring contacts,
• wherein a change of the measurement value indicates the presence of water in the gap between the first and second measuring contacts;
• or
• (b) the water sensor employs an optical measurement principle, the presence of water being determined by means of a light source and a light receiver arranged between a measurement point, water at the measurement point interrupting luminous flux between the light source and the light receiver or enabling luminous flux via scattering, and a change of the luminous flux indicating the presence of water at the measurement point.