Ullage float assemblies for fuel tanks are disclosed including a guide member with a retaining element mounted to a valve body which includes a first valve port and a second valve port in fluid communication. Methods of preventing spillage of fuel from a fuel tank during a refueling and a diurnal fuel volumetric expansion event are also disclosed. The assemblies and methods.

A field configurable autonomous vehicle includes modular elements and attachable components. The vehicle can be assembled from these modular elements and components to meet desired mission and performance characteristics without the need to purchase specially designed vehicles for each mission. The vehicle can include a module that enables the vehicle to be scuttled or destroyed.

An exemplary fuel cell ship is a fuel cell ship for propelling a hull by using electric power supplied from a fuel cell that generates electric power through an electrochemical reaction of fuel, and includes a compartment including an emission source of the fuel and a first detector arranged in the compartment to detect the fuel. If the first detector detects that a concentration of the fuel in the compartment is equal to or greater than a first threshold value, a power supply to a non-explosion-proof device in the compartment is stopped.

A fishing rod holder is described. The fishing rod holder may be used in a variety of manners, including on land and at sea (on a boat). The fishing rod holder may be used in a recess or a sleeve built into the boat, used in a fighting chair, or even held by the fisherman as needed. The rod holder may further allow the fishing rod to rotate during, for example, trolling or other types of fishing. The fishing rod holder also includes a structure that supports the fishing rod when the fishing rod begins to bend or flex under the weight of a fish.

A fishing rod holder is described. The fishing rod holder may be used in a variety of manners, including on land and at sea (on a boat). The fishing rod holder may be used in a recess or a sleeve built into the boat, used in a fighting chair, or even held by the fisherman as needed. The rod holder may further allow the fishing rod to rotate during, for example, trolling or other types of fishing. The fishing rod holder also includes a structure that supports the fishing rod when the fishing rod begins to bend or flex under the weight of a fish.

A boat cover system includes a receptacle and a telescoping tent pole secured in the receptacle. The tent pole may include an outer tube selectively securable in the receptacle, an inner tube slidably mounted within the outer tube, and a linear actuator coupled with the inner tube and configured to displace the inner tube relative to the outer tube. With a boat cover positioned over the telescoping tent pole, the telescoping tent pole is displaceable between a retracted position and an extended position by the linear actuator such that the telescoping tent pole is configured to tension the boat cover in the extended position and to ease the tension in the retracted position.

A boat cover system includes a receptacle and a telescoping tent pole secured in the receptacle. The tent pole may include an outer tube selectively securable in the receptacle, an inner tube slidably mounted within the outer tube, and a linear actuator coupled with the inner tube and configured to displace the inner tube relative to the outer tube. With a boat cover positioned over the telescoping tent pole, the telescoping tent pole is displaceable between a retracted position and an extended position by the linear actuator such that the telescoping tent pole is configured to tension the boat cover in the extended position and to ease the tension in the retracted position.

A boat has a rear platform including a pivotable hatch. A marine outboard engine has a bumper connected to the engine unit housing. When mounted to the boat, the marine outboard engine is located under the hatch and is pivotable from a trim range to a tilt range. When the hatch is in a closed position and the marine outboard engine is in the tilt range, pivoting the marine outboard engine upwardly to a first engine position causes the bumper to abut a bottom surface of the hatch. Pivoting the marine outboard engine upwardly from the first engine position to a second engine position causes the bumper to push up on the bottom surface of the hatch and to slide against the bottom surface of the hatch, thereby pivoting the hatch from the closed position to an open position.

A pedestal for mounting a downrigger fishing device to the deck of a watercraft, with the pedestal having a support post, a base plate, a mounting plate, one or more reinforcing members, and one or more securing plates.

A pedestal for mounting a downrigger fishing device to the deck of a watercraft, with the pedestal having a support post, a base plate, a mounting plate, one or more reinforcing members, and one or more securing plates.