What does a stand-on vessel expect from the give-way vessel in terms of action?

The stand-on vessel expects the give-way vessel to take early and substantial action to avoid a collision. This expectation is grounded in maritime navigation rules, particularly the International Regulations for Preventing Collisions at Sea (COLREGs).

When two vessels are approaching one another, the stand-on vessel has the right of way and may maintain its course and speed. However, the give-way vessel has the responsibility to act, and this often means altering its speed or course sufficiently and promptly to ensure safe navigational separation. This action must be substantial enough to eliminate any risk of collision, demonstrating the give-way vessel's awareness of the situation and its commitment to safe navigation.

The other options do not align with this responsibility. Increasing speed could actually create a higher risk of collision, signaling intent may be useful under certain circumstances, but does not fulfill the primary obligation to take action, and following the stand-on vessel could lead to a collision itself if not managed appropriately. The give-way vessel must act decisively and early to facilitate a safe passage for both vessels.