| Procedure | Location | Procedure Type | Description |
|---|---|---|---|
| AMPD | seakeeping_tsa | Function | Automatic multiscale-based peak detection (AMPD) |
| angle | seakeeping_math | Function | 计算两向量的夹角 |
| area | seakeeping_geometry | Interface | |
| ccwes_waveamplitude | seakeeping_wave | Subroutine | 中国沿海波能谱模型计算频段有义波幅 China Coastal Wave Energy Spectrum |
| centroid | seakeeping_geometry | Interface | |
| distance | seakeeping_geometry | Function | Distance between two points |
| euler_formula | seakeeping_math | Function | 欧拉公式 |
| heron_formula | seakeeping_math | Function | 海伦公式计算三角形面积 |
| hsp | seakeeping_statics | Function | 静水压 |
| ittc_spwes_waveamplitude | seakeeping_wave | Subroutine | 11th-ITTC (1966) 单参数波能谱模型计算频段有义波幅 ITTC single-parameter wave energy spectrum |
| ittc_tpwes_waveamplitude | seakeeping_wave | Subroutine | 12th-ITTC (1969) 双参数波能谱模型计算频段有义波幅 ITTC two-parameter wave energy spectrum |
| k01 | seakeeping_wave | Function | Wave number from wave frequency |
| k02 | seakeeping_wave | Function | Wave number from wave length |
| leapfrog | seakeeping_leapfrog | Subroutine | 速度比位移、加速度快半步长，本例程仅用作力学求解，求解一段时间内的力学变化，并更新时间 |
| leapfrog_final | seakeeping_leapfrog | Subroutine | 速度后退半步长，使其与位移、加速度同步 |
| leapfrog_init | seakeeping_leapfrog | Subroutine | 初始化leapfrog算法，初始化加速度及推进速度半步长 |
| root_formula | seakeeping_math | Subroutine | 一元二次方程求根公式 |
| TPC | seakeeping_statics | Function | 每厘米吃水吨数 |
| unitize | seakeeping_geometry | Function | Unitize a vector |
| vdeep | seakeeping_wave | Function | 深水波波速 |
| we | seakeeping_wave | Function | Encountered wave frequency |
| wenergy | seakeeping_wave | Function | Wave energy |
| wf | seakeeping_wave | Function | Wave frequency from wlr |
| wlr | seakeeping_wave | Function | Wavelength to length ratio |
| zeta | seakeeping_wave | Function | 单位波幅：\( \zeta = \sin(kx\cos\beta + ky\sin\beta + \omega t + phase) \) |