YOU SAID:

i am riding a sailboat with an unattended goat

INTO JAPANESE

私は無人ヤギとヨットに乗っています

BACK INTO ENGLISH

I am on a yacht with an unmanned goat

INTO JAPANESE

私は無人ヤギと一緒にヨットに乗っています

BACK INTO ENGLISH

I am on a yacht with an unmanned goat