RoR scenarios

You are the cargo vessel PDV to give way to sailing vessel – will probably go to sub around her stern. Rule 18 a(iv)
You are the cargo vessel Both PDV because sailing vessel is using engine. Cargo ship will keep out of the way and avoid passing ahead Rule 15 therefore One short blast on ships whistle Rule 34a and alter course to starboard.
You are the small vessel and are stand on under Rule 15, both PDV the container ship is not taking appropriate action Rule 17a(i) Maintained your course and speed Rule 17a(ii) You may take action Rule 34d Shall immediately indicate your doubt by five or more short blasts Rule 17a(i) continue to monitor and if no change then Rule 34c you Shall Not alter to port so Rule 34a sound one short blast and alter course to starboard….
You are the cargo vessel You are the give way vessel and shall keep out of the way of the vessel you are overtaking Rule 13 applies to any vessel
Two PDV head on. Both sound one short blast Rule 34a and alter course to Starboard