| tb = || Air Support Grid

| tc = || Artillery Referencing Systems

| td = || Graticule enhanced by alpha-and/or numeric notations

| te = || Arbitrary squaring

| tf = || PVO Reporting Net

| tg = || Kristovina map referencing system

| th = || Unspecified German wartime referencing system

| ti = || Quadratmeldenetz (QMN)

| tj = || Luftwaffemeldenetz (LWMN)

| tk = || Gradmeldenetz (GMN)

| tl = || Jaegermeldenetz (JMN)

| tm = || Orangemeldenetz (OMN)

| tn = || Georef (World Geographic Referencing System)

| to = || Grid enhanced by alpha and/or numeric notations

| tp = || Heeresmeldenetz (HMN)

| uu = || Unknown grid

| zz = || Other known grid