Seaports
| Seaport Name | Seaport Code | Country |
|---|---|---|
| Yampi Sound | AUYAM | Australia |
| Yarmouth (Can) | CAYQI | Canada |
| Ying Kow | CNNWC | China |
| Yantai | CNYAN | China |
| Ykspihlaja | FIYKS | Finland |
| Yokosuka | JPYOS | Japan |
| Yokoshima | JPYKS | Japan |
| Yokohama | JPYOK | Japan |
| Yokkaichi | JPYKK | Japan |
| Yamada | JPYAD | Japan |
| Yap | PCYAP | Micronesia |
| Ymuiden | NLIJM | Netherlands |
| Yeisk | SUYEY | Russia |
| Yenbo | SAYNB | Saudi Arabia |
| Yanbu | SAYNB | Saudi Arabia |
| Yosu | KRYOS | South Korea |
| Yumurtalik Bay | TRYUM | Turkey |
| Yarmouth (Uke) | GBGTY | United Kingdom |
| Yorktown | USYOR | United States of America |
| Yarmouth (Usa) | USYAR | United States of America |