An improved safety signaling apparatus intended to be used with watercraft to increase the visibility of the watercraft to others, incorporating a mast-supported signaling device, a base member for attachment to the watercraft, and a retention member removably attaching the mast assembly to the base member. The retention member is suitably adapted to maintain the mast assembly in a fixed orientation in relation to the base member under certain conditions, namely ordinary operation of the watercraft, and to permit independent movement of the mast relative to the base member under different conditions, namely when the mast is in danger of damage or for independent use or storage.