A first permissible operating range of the self-elevating vessel is determined based on a first structural analysis of the self-elevating vessel under a first set of conditions. A structural utilization ratio of the self-elevating vessel is determined based on a second structural analysis of the self-elevating vessel under first and second sets of conditions. Safety of lowering the self-elevating vessel from an elevated state to a first hull draft level is determined when the structural utilization ratio is less than a predetermined value. Safety of lowering the self-elevating vessel from the first hull draft level to a second hull draft level is indicated when positional displacement data obtained while the vessel is at the first hull draft level indicates that the positional displacement of the self-elevating vessel while at the first hull draft level is within the first permissible operating range.

A first permissible operating range of the self-elevating vessel is determined based on a first structural analysis of the self-elevating vessel under a first set of conditions. A structural utilization ratio of the self-elevating vessel is determined based on a second structural analysis of the self-elevating vessel under first and second sets of conditions. Safety of lowering the self-elevating vessel from an elevated state to a first hull draft level is determined when the structural utilization ratio is less than a predetermined value. Safety of lowering the self-elevating vessel from the first hull draft level to a second hull draft level is indicated when positional displacement data obtained while the vessel is at the first hull draft level indicates that the positional displacement of the self-elevating vessel while at the first hull draft level is within the first permissible operating range.

A sailboat race tracking system includes a race computer and a sailboat computing device authenticated to the race computer. The sailboat computing device transmits position data as a function of time to the race computer. An event organizer computing device sets a race start time and transmits the race start time to the race computer. The race computer receives the position data as a function of time from multiple sailboat computing devices and syncs it according to the race start time. The race computer transmits the time-synced position data of the sailboat computing devices to the sailboat computing devices and spectator computing devices for display.

A sailboat race tracking system includes a race computer and a sailboat computing device authenticated to the race computer. The sailboat computing device transmits position data as a function of time to the race computer. An event organizer computing device sets a race start time and transmits the race start time to the race computer. The race computer receives the position data as a function of time from multiple sailboat computing devices and syncs it according to the race start time. The race computer transmits the time-synced position data of the sailboat computing devices to the sailboat computing devices and spectator computing devices for display.

A vessel hull stabilization system includes a housing having a rotatable shaft mounted thereto, the shaft configured to connect to a fin such that the fin is located on an outside of the vessel hull and the housing is located on an inside of the vessel hull. A drive system is mounted to the housing and includes a motor and a drive element. The motor is connected to a central shaft of the drive element and an outer element of the drive element is connected to the fin shaft. The drive element includes a plurality of teeth positioned between the outer element and the central shaft such that when the motor rotates the central shaft, the plurality of teeth oscillate in a direction perpendicular to an axis of the central shaft to interact with and rotate the outer element. A controller receives sensor readings to determine control signals to send to the motor(s) to impart rotation of the fin.

A vessel hull stabilization system includes a housing having a rotatable shaft mounted thereto, the shaft configured to connect to a fin such that the fin is located on an outside of the vessel hull and the housing is located on an inside of the vessel hull. A drive system is mounted to the housing and includes a motor and a drive element. The motor is connected to a central shaft of the drive element and an outer element of the drive element is connected to the fin shaft. The drive element includes a plurality of teeth positioned between the outer element and the central shaft such that when the motor rotates the central shaft, the plurality of teeth oscillate in a direction perpendicular to an axis of the central shaft to interact with and rotate the outer element. A controller receives sensor readings to determine control signals to send to the motor(s) to impart rotation of the fin.

A system and method for deterring theft of a marine vehicles is provided. The system is designed to collect barometric pressure data and analyze it to determine whether there has been a sudden change in elevation that may be indicative of a theft. The system is also designed to collect environmental data pertaining to a marine vehicle's normal environment and compare it to a normal environmental state of the marine vehicle in order to detect changes that may be indicative of a theft. Additionally, the system is designed to monitor equipment of the marine vehicle and alert a user if the equipment has been moved in a way that may be indicative of a theft. When the system determines an event has occurred that may be indicative of a theft, the system may alert the user by triggering an alarm via a computer readable signal.

A system and method for deterring theft of a marine vehicles is provided. The system is designed to collect barometric pressure data and analyze it to determine whether there has been a sudden change in elevation that may be indicative of a theft. The system is also designed to collect environmental data pertaining to a marine vehicle's normal environment and compare it to a normal environmental state of the marine vehicle in order to detect changes that may be indicative of a theft. Additionally, the system is designed to monitor equipment of the marine vehicle and alert a user if the equipment has been moved in a way that may be indicative of a theft. When the system determines an event has occurred that may be indicative of a theft, the system may alert the user by triggering an alarm via a computer readable signal.

The position of a watercraft is detected by monitoring GPS position data, and the speed of the watercraft is reduced to a selected limit upon detecting that the watercraft has traveled outside of a selected boundary and is maintained until it is detected that the watercraft has been back within the boundary for a selected time interval, thereby avoiding up and down jerking motion of the watercraft which can occur when only a single location test is used to confirm that the watercraft is back in bounds. An RF transceiver and related control apparatus is employed for detecting other watercraft approaching too closely to the watercraft, and a display is provided for displaying various status and warning indications.

The position of a watercraft is detected by monitoring GPS position data, and the speed of the watercraft is reduced to a selected limit upon detecting that the watercraft has traveled outside of a selected boundary and is maintained until it is detected that the watercraft has been back within the boundary for a selected time interval, thereby avoiding up and down jerking motion of the watercraft which can occur when only a single location test is used to confirm that the watercraft is back in bounds. An RF transceiver and related control apparatus is employed for detecting other watercraft approaching too closely to the watercraft, and a display is provided for displaying various status and warning indications.