Making use of the data of tropical cyclone which happened at Northeastern Pacific Ocean from 1970 to 2000, forming source, monthly distribution, moving regulation and intensity change of tropical storm or hurricane have been statistically analyzed in this paper. It will have been useful for the deck officers to know active regular pattern of hurricane and to take measure avoiding it in this sea area.

But in the real navigation, ship will suffer from the influence of wind, wave and current. Furthermore, most of the maritime accidents are often happened in the atrocious weather condition, supported by the hurricane and storm.

It goes also to discuss the influence of different effects such as: vessel rolling amplitude due to waves under hurricane, swaying, heaving, wind pressure, shipping water oil board, Smith effect of waves etc, upon the above calculations.

The hypothesis on a similar MHD pulse allows one to explain in a semiquantitative way the short burst of electron field-aligned acceleration observed by the DE-2 satellite over the Debbie hurricane.

The equation of sound propagation in an unstable medium produced by the presence of supersaturated water vapor in it, which can appear in a hurricane area, is derived.

Generation of the Katrine hurricane during the geomagnetic extrastrom at crossing of the heliospheric current sheet: Is it an ac

Attention is paid to the generation of the Katrine hurricane with destructive consequences during the geomagnetic extrastorm of August 24, 2005, at a repeated crossing of the strongly disturbed IMF sector boundary.

The heating field in an asymmetric hurricane - Part I: Scale analysis

This paper gives the methods for criteria of stability of coasting self-propelling bucket dredgers under two conditions: on navigetion and 0:1 dredging. Criteria of stability on navigation consist of the calculations for: 1. Stability under hurricane. 2. Stability as vessels rolling broadside on the waves and under the action of a gale. 3. Stability as vessels rolling on the following oblique sea waves and under the action of gale. A method for calculation the statical stability curve under this condition...

This paper gives the methods for criteria of stability of coasting self-propelling bucket dredgers under two conditions: on navigetion and 0:1 dredging. Criteria of stability on navigation consist of the calculations for: 1. Stability under hurricane. 2. Stability as vessels rolling broadside on the waves and under the action of a gale. 3. Stability as vessels rolling on the following oblique sea waves and under the action of gale. A method for calculation the statical stability curve under this condition is given. It goes also to discuss the influence of different effects such as: vessel rolling amplitude due to waves under hurricane, swaying, heaving, wind pressure, shipping water oil board, Smith effect of waves etc, upon the above calculations. A criterion for stability on dredging is under the assumption that at dredging operation four kinds of heeling moments are acting simultaneously on the vessel. Simple formulas for calculation of these heeling moments and a brief discussion about these assumptions are given.

This paper presents a series of formulas to statistically predict design extreme values for four different situations; ( a ) short-term prediction; ( b ) long-term prediction from daily maximum wave heights, which has initial distribution as log-normal distribution) ( c ) long-term prediction from typhoon (or hurricane) wave heights, initial distribution of which has Gumbel (or Weibull) distribution) ( d ) long-term prediction from annual maximum wave heights. Difference between these new formulas and...

This paper presents a series of formulas to statistically predict design extreme values for four different situations; ( a ) short-term prediction; ( b ) long-term prediction from daily maximum wave heights, which has initial distribution as log-normal distribution) ( c ) long-term prediction from typhoon (or hurricane) wave heights, initial distribution of which has Gumbel (or Weibull) distribution) ( d ) long-term prediction from annual maximum wave heights. Difference between these new formulas and formulas used in ocean engineering is that calculated results by past formulas are probable extreme value, which has risk probability 0.632, but new type of formulas includes design return period and risk probability, therefore they can be used for predict design extreme value for different return period and risk probability.

Making use of the data of tropical cyclone which happened at Northeastern Pacific Ocean from 1970 to 2000, forming source, monthly distribution, moving regulation and intensity change of tropical storm or hurricane have been statistically analyzed in this paper. It will have been useful for the deck officers to know active regular pattern of hurricane and to take measure avoiding it in this sea area.