狹義偏航是故意且不合理改變約定之地理航路。廣義偏航除地理偏航外，尚包括

Narrow yaw is a deliberate and unreasonable change in the agreed geographic route. <br>In addition to geographical yaw, generalized yaw also includes over-loading, mis-delivery, cargo loading deck, etc. <br>The Maritime Law refers to yaw in a broad sense, while maritime insurance takes a narrow <br>standpoint of yaw from the insurance standpoint. In principle, the risk of yaw changes is not guaranteed. However, in practice, it is often covered by a conditional letter of guarantee. <br>P & I underwrites the liability for partial voyages, provided that the carrier must provide advance notice and additional premiums

Narrow yaw is a deliberate and unreasonable change of the geographical route of the agreement.<br>Broad yaw in addition to geographical yaw, but also includes over-unloading, mis-crossing, cargo loading deck and so on.<br>Maritime law refers to a broad yaw, while marine insurance is a narrow yaw<br>In the case of insurance, the risk of yaw change is not guaranteed in principle, but it is often underwritten in practice with the conditions attached to the contract.<br>The yaw liability underwritten by the P-I is subject to advance notice and additional premiums for the transporter

The narrow sense deviation is a deliberate and unreasonable change of the agreed geographical route.<br>In addition to geographical yaw, general yaw includes over unloading, wrong delivery, cargo loading deck, etc.<br>Maritime Law refers to the broad sense of yaw, while marine insurance refers to the narrow sense of yaw<br>In principle, the risk of deviation change is not guaranteed from the insurance standpoint, but in practice, it is usually covered by the proviso of the insurance contract.<br>P & I underwrite the liability of yaw on the condition that the carrier provides notice and additional premium in advance